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Last updated: September 12, 2026 How to Fix 100% Disk Usage in Windows 10 and Windows 11 Seeing 100% disk usage in Windows 11 can make your computer extremely slow. Apps may take a long time to open, File Explorer may stop responding, and Windows may freeze. 100% disk usage does not automatically mean that your hard drive or SSD is failing. Windows services, background applications, malware, low RAM, storage problems, file-system errors, or a slow mechanical HDD can all cause high disk activity. This guide explains how to find the cause and fix 100% disk usage on Windows 11 and Windows 10 . What Does 100% Disk Usage Mean? In Task Manager, the Disk percentage shows how busy the storage drive is with read and write operations. 100% disk usage does not mean that your drive is 100% full. It means the drive is fully busy at that moment. A short period of 100% activity can be normal during Windows updates, file transfers, antivirus scans, indexing, backups, or oth...

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, ...