Windows Update Breaks Network Connection

Windows Update Breaks Network Connection

Princeton, NJ – March 14, 2018  – Microsoft 2018 Security Updates causing some network adaptor failures

On March 13 Microsoft released their March Security Updates rollout.  Unfortunately we’ve received reports from a handful of clients and partners that some systems may lose network connectivity when the update completes because the network adaptor no longer functions.  Most incidents involve Dell OptiPlex Systems with Windows 7 however we have seen reports of HP machines and Windows 10.  In order to restore network connectivity, we recommend reinstalling the network card driver.  Do not roll back the update.  As a last resort you can perform a system restore.

It’s recommended to find another working internet connected system and download the appropriate network card driver.  Copy the files to a USB thumb drive and then transfer the files to the computer that lost connectivity.  Install the driver and check for connectivity.

If your a Blueclone client and have Help Desk Services, simply give us a call and we’ll help you through it.


There is a known issue with Microsoft’s March Security Patch Rollup (KB 4088875) breaking network connections for systems after the patch is installed and the device is rebooted.

We have immediately globally blacklisted this patch temporarily from being installed on all systems until we receive further information from Microsoft.

Microsoft has not yet officially acknowledged this issue or provided any steps for a fix. In the meantime, our team has been testing remediation steps for this issue. If this patch was installed and your device was rebooted, we recommend you take any of the following steps to restore the network connection:

1. Manually update the network settings to revert back to the original configuration.
2. If the machine has not yet been rebooted, you can uninstall the patch to avoid any issues
3. Reinstall the Network Adaptor Driver
4. Perform Windows Restore to Previous Restore Point prior to 03/13/18


Blueclone Networks is a Princeton based IT Company with focus on Computer Systems Management and Cloud Services for small & medium sized business in Central NJ.

2018-03-14T17:25:12+00:00 March 14th, 2018|Blog, Computer & Network Support, Computer Services, Computer Services, Managed Service Provider, NJ|Comments Off on Windows Update Breaks Network Connection