If you notice that your Windows PC is slow and now take a look into the Task Manager, you may see the "service host sysmain", which ensures 100% of the CPU load.
This process can be observed after rebooting and restarting the Windows system and can last several minutes.
If you want to solve the problem, we recommend that you perform the following two steps in sequence:
Step 1: Install updates
Make sure that the latest updates are installed on your Windows PC. To do this, navigate i the following submenu of the Windows system:
- Settings --> Update and Security --> Windows Update
Now select "Check for Updates / Install Now".
The system will now check for the latest software updates.
Step 2: SFC/ ScanNow Repairing damaged components
1. press the keys:
- Windows + X
2. the command prompt (Administrator) opens Now enter the following command:
- sfc /scannow
3. confirm the command with the Enter key
Your Windows computer will now scan the file system and check for possibly damaged system files and repair them if necessary.
Step 3: Perform DISM inspection and repair
In the command prompt, which must be executed as administrator, please enter the following commands in order:
- Dism /Online /Cleanup-Image /ScanHealth
Windows 10 checks the component memory for damage.
- Dism /Online /Cleanup-Image /CheckHealth
The results are displayed for the scan that was previously detected.
- Dism /Online /Cleanup-Image /RestoreHealth
This can be used to repair the detected errors.
Step 4: Uninstall antivirus software like Avira and CC Cleaner
Some antivirus programs or the CC Cleaner cause problems and can cause the "service host sysmain" to use 100% of its capacity. Therefore, you should uninstall these programs from your Windows 10 system as a test.
If this leads to an improvement, look for an alternative software.
These 4 steps should fix the problem with the 100% usage of the service host sysmain.