I started my Windows 11 PC and the system became almost unusable. Every click takes around 15 seconds to respond, and Task Manager shows the system drive at 100% usage. I've already tried disabling SysMain and a few other services. PowerShell reports that the SSD health is good, so I'm unsure whether this is a software problem, a background Windows process, or an early sign that the drive is failing. The SSD is the Windows installation drive, while my separate HDD remains at 0% usage. What should I check next?
2 Answers
Open Task Manager, go to the Disk column, and sort by usage so you can identify the process actually causing the load. It might be Search Indexer, a Defender scan, Windows Update, or another application rather than SysMain. If indexing is responsible, try reducing Windows Search indexing or temporarily stopping the Windows Search service. Also check whether an update was installed shortly before the problem began—sometimes a one-time scan or reindex settles down after a while. Event Viewer under Windows Logs > System may show disk warnings that help distinguish a software bottleneck from a drive problem.
The fact that the separate HDD stays at 0% suggests the problem is localized to the SSD or something repeatedly reading and writing the Windows installation. Check the SSD’s connection if it is a SATA model, review recent updates and drivers, and make a backup immediately if you can. Avoid changing BIOS or disk settings until your important data is secured.
I’ve already disabled SysMain, but I’ll check Task Manager, indexing, and Event Viewer to see what is actually using the disk.