Cannot access to Internet after installing Cumulative Update in Windows

If, after installing a Cumulative Update on Windows 11 or Windows 10, you cannot connect to the Internet or are facing other issues, this post offers some insights on how to fix the issues. Although they are expected to fix several bugs and improve performance, it is causing several problems. Some of the problems being mentioned by users after installing this update are:

Cannot access the Internet after installing
Lots of programs and apps stopped working, including some Google products.
Does not recognize WiFi adaptor
Restart loops
Bluetooth or Airplane Mode does not work.

Read: Why does every Windows Update have to bring problems.

Microsoft has gone on record to state that several users have been facing problems connecting to the Internet after installing Windows 10 Cumulative Update KB3201845. It has acknowledged users’ complaints and, as a troubleshooting step, has suggested resorting to the old practice of restarting their PCs. Alternatively, it has been advised to try and fix network connection issues.

When they visited the Windows Update History page, most users found the following banner displayed.

If you are experiencing issues connecting to the internet we recommend you restart your PC by going to Start, clicking the Power button, then choosing Restart (not Shut down).

If you have not yet installed this update, you can temporarily block it using the Show or Hide Updates Tool. If you have installed it and are facing this issue, the following troubleshooting steps might help you fix it.

Cannot access the Internet after installing Cumulative Update in Windows 11/10

1] Restart the PC

Try restarting your PC and checking if this fixes your connection problem. For this, click on the ‘Start’ button, choose the ‘Power’ option and then select ‘Restart’.

2] Run the Network Troubleshooter Followed by Networking Commands

The Network Troubleshooter is an essential tool for every network administrator. It can be used to troubleshoot a variety of different network conditions. You can help diagnose and fix common connection problems.

To run the Network troubleshooter, type Network troubleshooter in the search box on the taskbar and select Identify and repair network problems from the results list.

Then, follow the steps in the troubleshooter and see if that fixes the problem.

Read: Windows cannot connect to the Internet.

3] Update the network adapter driver

In most cases, the problem may arise due to an outdated or incompatible network adapter driver. In many cases, drivers designed for older versions of Windows will work just fine in newer versions. However, depending on the type of device, many hardware devices need a new driver to function properly on Microsoft’s latest operating system.

If you recently upgraded to Windows 10, it’s possible that the current driver was designed for a previous version of Windows. Just check to see if an updated version of the same driver is available.

For this, in the search box on the taskbar, type Device Manager, and then select Device Manager from the results list. Then, under Device Manager, select Network adapters > the network adapter name.

Now, press and hold (or right-click) the network adapter, and then select Update Driver Software > Search automatically for updated driver software. Follow the steps on screen, then select Close.

Once you have installed an updated driver, select the Start button > Power > Restart if you’re asked to restart, and see if this fixes your problem.

When Windows fails to find a new driver for your network adapter, visit the PC manufacturer’s website and download the latest network adapter driver. If your PC can’t connect to the Internet, try downloading the driver on a different PC and save it to a USB flash drive, so you can manually install it on your PC. Important information you should look for any driver while downloading,

PC manufacturer
Model name or number

Read: How to Uninstall, Disable, Roll Back, Update Device Drivers

4] Roll Back the Network Adapter Driver

If you were connected before and recently installed a new network adapter driver, rolling back your driver to a previous version might help. To roll back to the old network adapter driver, type Device Manager in the search box on the taskbar and then select Device Manager from the results list.

In Device Manager, select Network adapters > the network adapter name. Right-click the network adapter, and then select Properties. Select the Driver tab > Roll back driver in Properties, then follow the steps on-screen.

The button indicates no driver to roll back to if it is unavailable.

After rolling back to the previous version of the driver, select the ‘Start’ button, chose the Power option, and select ‘Restart’ when prompted to restart.

5] Uninstall the Network Adapter Driver and Restart

If all of the above steps have failed to yield the desired results, try uninstalling the network adapter driver and then restart your computer to have Windows automatically install the latest driver. Please note that this method should be resorted to when your network connection has stopped working correctly after a recent update.

Type Device Manager in the search box on the taskbar and then select Device Manager from the results list.

Then, under the Device Manager category, select Network adapters and look for the network adapter name. When found, select it, right-click it and then select Uninstall option. Put a sign against the ‘Delete the driver software for this device’ checkbox and choose OK to confirm your uninstall.

After uninstalling the driver, select the Start button, select Power, and choose the ‘Restart’ option.

After following the above procedure, Windows will automatically look for and install the network adapter driver when your PC restarts. Check to see if that fixes your connection problem. If Windows doesn’t automatically install a driver, try to install the backup driver you saved earlier before uninstalling.

6] Reset some settings

If this fails, try these as an alternative:

Reset the TCP/IP stack
Release the IP address
Renew the IP address
Flush and reset the DNS client resolver cache

For running these networking commands in a command prompt window, run the following commands in an elevated Command prompt:

netsh winsock reset

netsh int ip reset

ipconfig /release

ipconfig /renew

ipconfig /flushdns

7] Temporarily Turn off Firewall

In many cases, it is observed that firewall software might sometimes interfere with Internet connection settings and prevent you from getting connected. You can check if a firewall causes the connection issue by temporarily turning it off and then trying to visit a website you trust.

The steps required to turn off a Firewall depend on the firewall software you’re using. Not having a firewall turned on makes your PC more vulnerable to hackers, worms, or viruses, so turn it on as soon as you finish checking issues related to the firewall settings.

If you face trouble turning off your firewall, in an elevated command prompt, type the following and then press Enter:

netsh advfirewall set allprofiles state off

Open your web browser, visit a website you trust, and see if you can connect to it.

To turn on all firewalls, you might have installed, at the command prompt, type this and press Enter.

netsh advfirewall set allprofiles state on

If you find the firewall software is causing the connection issues, contact the software manufacturer or visit their website to check and see if updated software is available.

8] Temporarily turn off any antivirus or security software

Although all the malware protection software and anti-virus systems are designed to avoid unwanted threats, sometimes, these might stop you from getting connected. You can verify if the connection issue is caused by antivirus software by turning it off temporarily and then trying to visit a website you trust.

9] Use Network Reset to reinstall Network Devices

Try the Network Reset feature. This should be used as your last resort. Consider using it when all other methods fail to get you connected.

This method can help solve connection problems you might have faced following an upgrade from a previous version of Windows to the latest version of Windows. The method works primarily by removing any network adapters you have installed and any settings that might be associated with them. After your PC restarts, any network adapters are reinstalled, and the settings for them are set to the defaults.

If you need advanced manual troubleshooting suggestions, Microsoft suggests the following:

10] Generate a Wireless Network Report

The report can help you diagnose the problem, or at least give you some relevant information that might help in getting the problem fixed. To generate a wireless network report, open an elevated CMD type the following and hit Enter:

netsh wlan show wlanreport.

This will generate an HTML file that you can easily open in your web browser from the location listed under the command prompt. You will then have to analyze the problems if any.

11] Check ISP

Make sure that there’s not any problem with your cable modem or Internet Service Provider (ISP). If, at all there is, contact your ISP. You can check this by typing the following in an elevated command prompt and hitting Enter:

ipconfig

Look for the IP address listed next to Default gateway. Type ping <DefaultGateway> and press Enter. For example, type ping 192.168.1.1 and press Enter.

The result should be something like this:

Reply from 192.168.1.1: bytes=32 time=5ms TTL=64

Ping statistics for 192.168.1.1: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 4ms, Maximum = 5ms, Average = 4ms

If all appears fine, close the window and exit.

If the ping is booming, and you see results similar to the results above but can’t connect to the Internet on your PC, there may be a problem with your modem or Internet service provider (ISP).

These posts offer additional troubleshooting suggestions:

Can Windows Update cause internet problems?

Yes, in some cases, Windows Updates can cause internet problems. When a new update is released, it can sometimes cause conflicts with your internet connection, particularly if you have an older version of Windows or your computer’s drivers are outdated. This can result in slow internet speeds, connection errors, or other problems affecting your ability to use the internet.

Is it safe to uninstall a Windows Update?

In general, it’s safe to uninstall a Windows Update as long as you’re doing it correctly. Uninstalling an update will remove it from your system and should not cause any problems with your computer. However, keep the following in mind to avoid uninstalling a security update and check if it caused any compatibility issues with certain programs or hardware.