Windows 11 March 2026 Update Is Causing BSOD and Freezes on Some PCs - Here Is What to Do

Microsoft pushed out its March 2026 Patch Tuesday update last week and while it fixed a long list of security problems, it also broke things for a group of unlucky users. Reports started coming in quickly after the update installed that some PCs running Windows 11 were experiencing blue screens and random freezing. If your computer has been acting up since the update, you are not imagining it and you are not alone.

The update in question is KB5079473, which targets Windows 11 versions 24H2 and 25H2. On most machines it installs without drama. On others, especially certain Samsung PCs, it has caused serious problems including an inability to access the C drive. Microsoft has officially acknowledged this issue.

What the March 2026 Update Was Supposed to Do

This was not a small update. Microsoft patched 84 security vulnerabilities this month, including some serious ones. There were two publicly disclosed zero-day flaws, one in SQL Server and one in .NET. Office users also got patches for two remote code execution bugs that could be triggered just by previewing a file in the reading pane without even opening it. On top of that, an Excel flaw was fixed that could have let attackers steal data through Microsoft Copilot.

Beyond security, the update added some genuinely useful things. Windows now has a built-in network speed test you can access directly from the taskbar by right clicking the Wi-Fi icon. The Sysmon monitoring tool is now available as an optional Windows feature. Emoji 16 support finally landed in the emoji picker. And Microsoft started rolling out infrastructure changes to prepare for Secure Boot certificate renewals, which become critical before June 2026.

All good things. The problem is the update also introduced instability on a portion of devices.

How to Check If the Update Is the Cause of Your Problems

The most straightforward way to confirm this update caused your issues is to check when the problems started. If your PC began freezing or showing blue screens around March 10 to 14, and you have not changed anything else on your machine, KB5079473 is almost certainly the culprit.

You can verify the update is installed by going to Settings, then Windows Update, then Update History. Look for KB5079473 in the list and check the installation date. If it is there and your troubles started around the same time, proceed to the fixes below.

Fix 1: Uninstall the Update and Wait for a Corrected Version

This is the safest and most straightforward approach for most people. Go to Settings, then Windows Update, then Update History, then Uninstall Updates. Find KB5079473 in the list, click it, and select Uninstall. Your PC will restart and go back to the previous version.

After doing this, temporarily pause Windows Update for one or two weeks. Microsoft will release a corrected version and once the community confirms it is stable, you can allow updates again. To pause updates, go to Settings, Windows Update, and click Pause for 1 week.

Fix 2: Run Startup Repair If Your PC Will Not Boot Properly

If your machine is freezing before you can even get to the desktop, you need to get into Windows Recovery Environment. Force shut down your PC three times in a row by holding the power button and Windows will automatically offer recovery options on the next start. From there choose Troubleshoot, then Advanced Options, then Startup Repair and let it run.

If Startup Repair does not solve it, go back to Advanced Options and choose Uninstall Updates, then select the most recent quality update to remove KB5079473 from there.

Fix 3: For Samsung PC Users Having C Drive Access Issues

Microsoft has specifically confirmed that Windows 11 KB5077181, which was part of the February update rollout, caused some Samsung PCs to lose access to the C drive. The March update carried this issue forward on affected devices. Samsung and Microsoft are aware of it. The temporary workaround is to boot into Safe Mode by holding Shift while clicking Restart, going to Troubleshoot, Advanced Options, Startup Settings, and then pressing F4. From Safe Mode you can uninstall the problematic update through Settings.

One More Thing Every Windows User Needs to Do Before June 2026

Buried in this update is something important that goes beyond the freezing issues. Microsoft has warned that Secure Boot certificates on many Windows devices will start expiring in June 2026. If your device does not get updated with new certificates before then, it could have trouble booting securely.

For most users this will happen automatically through Windows Update over the coming months. But if you have Windows Update paused or disabled, you will want to turn it back on and let the certificate update through before June arrives. This is not something to ignore.

Common Questions About the March 2026 Windows Update

Should I install the March 2026 Windows update right now?

If you have not installed it yet and your work or studies depend on your PC running reliably, it is reasonable to wait a week or two for Microsoft to release a corrected patch. The security fixes are important but none of the vulnerabilities patched this month are being actively exploited right now, so a brief delay is not a significant risk for most home users.

Will uninstalling the update leave my PC less secure?

Temporarily, yes, your PC will be missing some security patches. But since none of the flaws fixed this month are currently being used in real attacks, the practical risk is low for a short waiting period. Just avoid clicking suspicious links or opening unexpected email attachments in the meantime, which is good advice regardless.

How do I know when Microsoft releases a fixed version of the update?

The easiest way is to follow Windows Latest or Bleeping Computer online. Both sites cover Windows updates in plain language and will report quickly when Microsoft releases a corrected patch. You can also check Windows Update in your Settings after resuming updates and look for a new KB number replacing KB5079473.