Shortly after adopting the newest Windows 11 update, many users noticed a drop in system performance. The Neowin portal logged a surge of complaints from PC owners about this issue.
Reports indicate that some machines ran 5 to 10 percent slower after upgrading to Windows 11 23H2. The slowdown was validated using specialized diagnostic tools, and a few users experienced sporadic stuttering when launching games. In several cases, the only effective remedy was to revert to Windows 11 22H2, the prior release.
Industry insiders suggest the culprit could be tied to how Windows Defender operates in conjunction with the new update. In certain scenarios, turning Defender off or resetting its settings appeared to restore the system to its previous performance levels.
Microsoft has not issued an official statement about this situation. There is a possibility that performance will improve with subsequent updates, but for now users are left with options to disable Windows Defender temporarily or to roll back to the earlier Windows 11 version.
A prior issue involved a naming error that affected printers, which was later renamed in the Windows updates.