SysMain is a built-in Windows 10 feature. It watches how you use your computer and tries to make things faster—like opening apps quicker.

But sometimes, it slows everything down instead of using too much power. The good news? It’s not critical, so you can turn it off if it’s causing problems.

When SysMain takes up too many resources, your computer slows down. This can lead to crashes, lost files, or even hardware damage if it keeps happening.

If SysMain is messing with your system, shutting it down is smart. Check out the steps below to fix it.

Ways to Fix SysMain’s High CPU and Memory Use

Note: Some fixes need an administrator account. You should log in as one to follow these steps.

Option 1: Turn Off SysMain in Services

Here’s how to stop SysMain from using the Services tool:

1. On your keyboard, press Windows + R.
2. Type “services.msc” and hit Enter. This opens a list of services.
3. Find SysMain in the list, right-click it, and pick Properties.
4. In the General tab, set the Startup type to Disabled. Then click Stop under Service status.
5. Hit Apply, then OK to save. Your computer should feel faster now.

Option 2: Shut Down SysMain with Command Prompt

This method uses a command line and works best if you’re comfortable with basic tech stuff:

1. Open Command Prompt as an admin:
   
   • Search “Command Prompt” in the taskbar, right-click it, and choose Run as Administrator.
   • Or press Windows + R, type “cmd,” then press Ctrl + Shift + Enter.
   • Or press Windows + X and select Command Prompt (Admin).
     
2. Click Yes if a permission pop-up appears.
3. Type this command and press Enter: sc stop “SysMain” & sc config “SysMain” start=disabled
4. Restart your computer to finish.

Option 3: Stop SysMain Using Registry Editor

This method tweaks your system’s settings with the Registry Editor:

1. Press Windows + R to open Run.
2. Type “regedit” and press the return key to open the Registry Editor.
3. Go to this path: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SysMain.
   • Tip: Copy and paste it into the address bar at the top for speed.
     
4.  Find the Start entry, right-click it, and hit Modify.
5.  Set the value to 4, then click OK. Don’t change anything else!
6.  Close the editor and restart your computer.
   Warning: Back up your registry first in case something goes wrong.

Option 4: Check System Files with SFC

The System File Checker (SFC) can fix broken files that might be causing SysMain issues:

1. Open Command Prompt as an admin (see Option 2 for how).
2. Type sfc /scannow and press Enter.
3. Wait for the scan to finish—it might take a while. Don’t close the window or turn off your PC.
4.  Restart your computer when it’s done.

Closing Thoughts

These steps should help you tame SysMain and boost your computer’s speed.

For more tips, check out our Help Center, which has many guides. Or reach out to our team for quick support!