Microsoft’s KB5000842 and KB5001330 update pages explain the issue and note the fix. “A small subset of users have reported lower than expected performance in games after installing this update,” Microsoft said. “Most users affected by this issue are running games full screen or borderless windowed modes and using two or more monitors.” My two monitors and have experienced wonk since the March update, though computers are such mysteries I hadn’t pinned down a specific cause. Some people reported that uninstalling the update fixed the problem, a fix which spread enough that even Nvidia relayed the reports as a possible fix. Now Microsoft have rolled back the specific change that was wonking games. Microsoft say they’re fixing the issue using Known Issue Rollback, a Windows 10 feature which they explain lets them “quickly revert a single, targeted fix to a previously released behavior if a critical regression is discovered.” Basically, they can tell your Windows to turn off the bad bit of the patch. They should have happened automatically by now, though I will confess I forced a manual Windows Update check and rebooted my PC too because it’s a comforting ritual, y’know?
