No Internet After a Windows Update? Reset the Network Stack in Four Commands

A Windows update installs successfully, the computer restarts—and suddenly there is no internet connection.

The Wi-Fi icon may show that you are connected. Ethernet may appear active. Other devices on the same network may work normally, yet the updated Windows 11 PC cannot open websites, connect to Microsoft 365 or reach network resources.

In many cases, the problem is not the router or internet service. The update may have disrupted part of the Windows networking configuration.

Resetting the network stack can rebuild the affected components and restore connectivity. This guide explains what the network stack is, how to reset it using four commands and what to check when the connection still does not return.

Why Can a Windows Update Break the Internet Connection?

Windows updates can change or refresh components involved in networking, including:

• Wi-Fi and Ethernet drivers
• TCP/IP settings
• DNS configuration
• Windows Filtering Platform components
• Firewall rules
• VPN virtual adapters
• Network profiles
• Winsock entries

Most updates install without causing problems. However, a driver conflict, corrupted setting or incompatible VPN component can sometimes leave Windows unable to communicate correctly after restarting.

Common symptoms include:

• Connected to Wi-Fi but no internet
• Ethernet connected but websites do not load
• “Unidentified network”
• “No internet, secured”
• Microsoft Teams or Outlook unable to connect
• Network drives unavailable
• DNS errors in the browser
• Automatic repair failing to resolve the issue
• Internet returning temporarily after another restart

Before resetting anything, confirm that the problem affects only the updated PC.

First, Check Whether the Internet Is Actually Down

Test another device on the same network.

Use a phone, tablet or another computer to open a website. If nothing can connect, the problem is more likely to involve:

• The router
• The broadband service
• A local network outage
• A failed access point
• An upstream firewall

If other devices work normally, continue troubleshooting the Windows 11 computer.

What Is the Windows Network Stack?

The network stack is the collection of Windows components that allows applications to communicate over a network.

It includes:

• TCP/IP
• Winsock
• Network adapters
• DNS resolution
• Routing
• Network services
• Firewall integration

Applications do not communicate directly with the Wi-Fi or Ethernet hardware. They send requests through these Windows networking layers.

If one layer becomes corrupted, the computer may appear connected while being unable to exchange data properly.

Before Running the Commands

Save any open work and make sure you know the password for the Wi-Fi network.

You may also need to reconnect:

• VPN software
• Static IP settings
• Network drives
• Proxy settings
• Specialist business applications

The commands below must be run from an elevated Command Prompt or Windows Terminal.

To open one:

1. Right-click the Start button.
2. Select Terminal (Admin).
3. Approve the User Account Control prompt.
4. Open a Command Prompt tab if required.

Run each command separately and allow it to finish before entering the next one.

Command 1: Reset Winsock

Enter:

netsh winsock reset

Winsock controls how Windows applications access network services.

Its catalogue can be affected by:

• VPN clients
• Security software
• Malware
• Proxy software
• Network filtering tools
• Damaged Windows components

Resetting Winsock returns the catalogue to its default condition.

You will normally see a message explaining that the reset completed successfully and that the computer must be restarted.

Do not restart yet. Complete the other commands first.

Command 2: Reset TCP/IP

Enter:

netsh int ip reset

This resets important TCP/IP configuration settings.

TCP/IP is responsible for addressing and transferring data between the computer and other network devices. A damaged TCP/IP configuration can cause:

• Invalid IP addresses
• Missing default gateways
• Failed DHCP communication
• Local connectivity without internet access
• Broken network routes

The command may display several lines showing which entries were reset.

Some entries may report that access was denied. If the main reset completes and the terminal was opened as administrator, restart and test the connection before making deeper changes.

Command 3: Release the Current IP Address

Enter:

ipconfig /release

This releases the IP address currently assigned to the computer by the router or DHCP server.

After running it, the network connection may appear fully disconnected. That is expected.

The computer is giving up its current network address so that it can request a fresh one.

On a device with several adapters, you may see information for:

• Wi-Fi
• Ethernet
• VPN adapters
• Virtual switches
• Bluetooth networking

Disconnected adapters may report that no operation can be performed. This is usually harmless.

Command 4: Request a New IP Address

Enter:

ipconfig /renew

Windows will now request a new IP address and network configuration.

This should provide:

• A fresh local IP address
• The correct subnet mask
• The default gateway
• DNS server details

The process may take several seconds.

Once complete, restart the computer even if the internet appears to have returned. The Winsock and TCP/IP resets are not fully applied until Windows restarts.

Restart the PC

After running all four commands:

1. Close the terminal.
2. Restart Windows.
3. Reconnect to Wi-Fi if necessary.
4. Test several websites.
5. Open a Microsoft 365 application.
6. Test any required company resources.

Do not simply shut down and turn the PC back on. On some Windows systems, Fast Startup means that a shutdown does not perform the same full restart process.

Use Start → Power → Restart.

Optional: Flush the DNS Cache

If the connection works but websites still fail to load by name, clear the local DNS cache.

Open Terminal as Administrator and run:

ipconfig /flushdns

This removes stored DNS records and forces Windows to request fresh address information.

A DNS issue is likely when:

• Websites work by IP address but not by name
• Internal server names cannot be found
• Network drives using hostnames fail
• Some websites load while others do not
• The browser reports a name-resolution error

Flushing the DNS cache is useful, but it does not repair a broken adapter, driver or internet connection.

Test the Connection Properly

Opening one website is not always enough to confirm that networking is fixed.

Use the following checks.

Check the IP Configuration

Run:

ipconfig

Look at the active adapter.

A typical local address may begin with:

192.168

or:

10.

An address beginning with:

169.254

usually means Windows failed to obtain a valid address from the DHCP server.

This suggests a problem involving:

• The router
• DHCP
• The network driver
• The wireless connection
• A damaged cable
• The adapter configuration

Test the Local Network

Run:

ping 127.0.0.1

This tests the local TCP/IP stack.

Then test the default gateway shown by ipconfig. For example:

ping 192.168.1.1

Replace the address with your actual gateway.

If the gateway responds, the computer can communicate with the local network.

Test Internet Connectivity

Run:

ping 8.8.8.8

A response suggests that internet routing is working.

If this succeeds but websites do not load, the problem is probably DNS-related.

Test DNS

Run:

nslookup microsoft.com

This shows which DNS server is responding and whether it can resolve the website name.

What to Do When the Four Commands Do Not Work

A network-stack reset solves many software configuration problems, but it cannot fix every cause of lost connectivity.

Work through the following checks.

Check Windows Update Again

Open:

Settings → Windows Update

Look for:

• Another update waiting to install
• A failed driver update
• A pending restart
• An optional network driver
• A known rollback option

Sometimes a follow-up update resolves a problem introduced by an earlier release.

If the issue began immediately after a specific update, note its KB number before taking further action.

Reinstall the Network Adapter

Open Device Manager and expand Network adapters.

Locate the active Wi-Fi or Ethernet adapter.

Then:

1. Right-click the adapter.
2. Select Uninstall device.
3. Do not remove the driver package unless you have a replacement available.
4. Restart the PC.

Windows should detect and reinstall the adapter automatically.

This is particularly useful when the adapter appears in Device Manager but does not function correctly.

Install the Manufacturer’s Driver

Windows Update does not always install the best driver for every device.

Obtain the current driver from the computer or motherboard manufacturer, particularly for:

• Intel Wi-Fi adapters
• Realtek Ethernet adapters
• Qualcomm wireless adapters
• Broadcom networking
• USB network adapters
• Docking stations

Avoid third-party driver-update utilities. They can install incorrect drivers and make troubleshooting more difficult.

For business computers, drivers should be tested before being deployed across many devices.

Check Whether the Adapter Is Disabled

Open:

Settings → Network & Internet → Advanced network settings

Confirm that the required adapter is enabled.

You can also open:

ncpa.cpl

Right-click the Wi-Fi or Ethernet adapter and check whether Enable is available.

If it is, select it.

Forget and Reconnect to the Wi-Fi Network

A saved wireless profile can sometimes become corrupted.

Go to:

Settings → Network & Internet → Wi-Fi → Manage known networks

Select the network and choose Forget.

Reconnect using the correct wireless password.

This recreates the saved profile and security settings.

Check VPN Software

VPN clients install virtual adapters and network filters.

After a Windows update, an outdated VPN component may interfere with ordinary internet traffic even when the VPN is disconnected.

Try:

• Fully closing the VPN client
• Updating the VPN software
• Removing unused VPN applications
• Reinstalling the required VPN client
• Checking for virtual adapters left by old software

Do not disable essential business security tools permanently. Use temporary testing to identify the cause.

Check Third-Party Security Software

Endpoint security, antivirus and firewall products also interact with the Windows network stack.

An incompatible driver or filter can block traffic after an update.

Check whether the security product has:

• A pending update
• A compatibility warning
• A damaged network filter
• A required restart
• An expired licence

Businesses should contact their IT provider before disabling managed security protection.

Review Proxy Settings

A proxy setting can prevent websites and applications from connecting.

Open:

Settings → Network & Internet → Proxy

Unless your organisation deliberately uses a proxy, confirm that no unexpected manual proxy is enabled.

Also run:

netsh winhttp show proxy

If the computer should not use a WinHTTP proxy, it should normally report direct access.

Do not remove a proxy configuration on a managed business PC without confirming that it is not required.

Check the Date and Time

An incorrect system clock can cause secure websites, VPNs and Microsoft services to reject connections.

Open:

Settings → Time & language → Date & time

Confirm that:

• The time is correct
• The time zone is correct
• Automatic time is enabled
• The clock synchronises successfully

This is easy to overlook after BIOS, battery or update problems.

Try Windows Network Reset

If the four commands do not resolve the issue, Windows includes a broader reset option.

Go to:

Settings → Network & Internet → Advanced network settings → Network reset

This removes and reinstalls network adapters and returns networking components to their default settings.

After the reset, you may need to:

• Reconnect to Wi-Fi
• Reinstall VPN software
• Reconfigure virtual adapters
• Restore static IP settings
• Reapply specialist network settings

Use this option only after recording any custom configuration.

Check for Static IP Settings

Some business computers, servers and specialist systems use manually configured addresses.

A network reset may replace those settings with automatic DHCP configuration.

Before changing anything, record:

• IP address
• Subnet mask
• Default gateway
• Preferred DNS server
• Alternate DNS server

If the device requires a static address, restore the approved settings afterwards.

Roll Back the Driver

If Windows Update replaced the network driver, rolling it back may restore the connection.

In Device Manager:

1. Open the adapter’s Properties.
2. Select the Driver tab.
3. Choose Roll Back Driver if available.
4. Restart Windows.

The option may be unavailable if the previous driver files have already been removed.

Consider Removing the Recent Update

Removing a security update should not be the first response because doing so may leave the PC exposed.

However, if:

• The problem began immediately after one update
• Other troubleshooting has failed
• The issue affects several similar PCs
• The update is confirmed as the cause

then a controlled rollback may be appropriate.

Open:

Settings → Windows Update → Update history → Uninstall updates

Business devices should be protected with a managed update policy rather than left indefinitely without security patches.

When the Problem Is Hardware-Related

A network-stack reset cannot repair failing hardware.

Consider a physical issue when:

• Wi-Fi disappears completely from Device Manager
• Ethernet reports that no cable is connected
• The connection drops when the laptop moves
• Other operating systems cannot use the adapter
• A USB network adapter works while the internal one does not
• The adapter repeatedly disconnects
• Device Manager reports a hardware error

Possible causes include:

• A failed Wi-Fi card
• A damaged Ethernet port
• A faulty network cable
• A failing docking station
• Loose internal antenna cables
• Router or access-point failure

Test with another cable, port or adapter before assuming Windows is responsible.

Avoid Random Registry Fixes

Many online guides recommend deleting registry entries or permanently disabling network services.

These changes can:

• Break future updates
• Disable VPN connectivity
• Affect business security tools
• Prevent automatic network configuration
• Make the original problem harder to diagnose

Start with supported commands and settings.

Make one change at a time and test the result.

A Quick Recovery Checklist

When Windows 11 loses internet access after an update:

1. Test another device on the network.
2. Restart the computer and router.
3. Run the four network-stack commands.
4. Restart Windows again.
5. Check the IP address and gateway.
6. Test the internet by IP address.
7. Test DNS resolution.
8. Review the network driver.
9. Update VPN and security software.
10. Use Windows Network Reset if required.

This order helps distinguish a Windows configuration problem from a driver, router or hardware fault.

How Hamilton Group Can Help

A Windows update should improve security and reliability—not leave your employees without internet access.

Hamilton Group can diagnose network failures, repair Windows networking, resolve driver conflicts and restore secure access to business services.

We can help with:

• Windows 11 troubleshooting
• Wi-Fi and Ethernet problems
• DNS and DHCP diagnostics
• Network-driver management
• VPN connectivity
• Microsoft 365 access
• Firewall and security configuration
• Managed Windows updates
• Remote-working support
• Ongoing IT management

Our engineers investigate the underlying cause rather than repeatedly applying temporary workarounds.

Reset the Stack, Then Find the Cause

The four commands are:

netsh winsock reset

netsh int ip reset

ipconfig /release

ipconfig /renew

They reset Winsock, rebuild TCP/IP settings and obtain a fresh network configuration.

For many PCs, that is enough to restore internet access after a Windows update. When it is not, the next step is to investigate the network driver, VPN software, security filters and physical adapter.

For help with Windows 11 networking problems, contact Hamilton Group on 0330 043 0069 or book an appointment with one of our experts