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Windows 11 PC Running Slow? 14 Ways to Fix It Is your Windows 11 PC running slowly, taking too long to start, or freezing when you open apps? Slow performance can have several causes, including too many startup apps, low storage space, high CPU or memory usage, Windows problems, malware, or older hardware. This guide shows practical ways to find the cause and improve Windows 11 performance without immediately resetting or reinstalling Windows. Quick Answer: If your Windows 11 PC is slow, first restart the computer and check CPU, Memory, and Disk usage in Task Manager. Then disable unnecessary startup apps, free up storage, install Windows updates, remove unused software, scan for malware, and check whether your hardware is limiting performance. Why Is My Windows 11 PC Running Slow? There is no single cause of a slow Windows 11 PC. Performance can decrease when too many applications run in the background, storage space becomes limited, startup programs consume resources, ...