Windows & BSOD · medium

How to fixDISK-USAGE-100

Disk usage at 100% in Task Manager

What this error means

DISK-USAGE-100 shows up as a medium-severity Windows operating system fault. The system gets extremely stuck, the response takes seconds, the disk is lit at 100% in the task manager. It's most often caused by sysMain (SuperFetch) or Windows Search aggressively index and corrupt paging file. Use the steps below to track down and fix the cause.

Before you begin

Save open work and back up important files. Note any recent driver or hardware changes. If Windows cannot start, use the startup guide first.

Work through these checks

0 of 3 complete
01Disable the SysMain service

Disable the SysMain service.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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02Upgrade your system from HDD to SSD

Upgrade your system from HDD to SSD.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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03Wait for Windows Update to complete its background process

Wait for Windows Update to complete its background process.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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Possible causes

  • SysMain (SuperFetch) or Windows Search aggressively index
  • Weak platter hard disk drive (HDD) as system
  • Corrupt paging file