If in the Task Manager the disk is constantly loaded at 100%, the computer starts to lag, takes a long time to open programs, and freezes. Most often, the problem is related to Windows services or background processes.
Below are the fastest ways to solve the issue.
Method 1: Disable Windows Search (check)
Sometimes the indexing service overloads the disk.
- Press Win + R
- Type
services.msc - Find Windows Search
- Click Stop
- Set the startup type to Disabled
Check if the load has decreased.
Method 2: Disable SysMain (Superfetch)
This service often causes 100% load on the HDD.
- Open the command prompt as an administrator
- Execute:
net stop sysmain
sc config sysmain start=disabled
Restart the computer.
Method 3: Check the disk for errors
File system corruption can cause constant activity.
Open the command prompt as an administrator:
chkdsk C: /f /r
If the system suggests checking after rebooting — agree.
Method 4: Check system files
sfc /scannow
After completion, restart the PC.
Method 5: Update SATA controller drivers
- Press Win + X → Device Manager
- Open the IDE ATA/ATAPI controllers section
- Update the controller drivers
You can also try switching the mode from AHCI to the standard Microsoft driver.
Additional reasons
- An HDD is installed instead of an SSD
- Antivirus scanning is running
- Insufficient RAM
- Windows is updating
When to consider replacing the disk
If an old HDD is used, high load is a common occurrence. Switching to an SSD almost completely resolves the issue.
Conclusion
In most cases, disabling SysMain or Windows Search helps. If the problem persists — check the disk and system files.
If the disk is physically worn out, software methods will only provide a temporary effect.