How to Disable Superfetch / SysMain in Windows 10/11

Superfetch is a finctionality in windows 10 & 11  introduced for two purposes. The first one is decreasing boot time and the second one is loading apps faster. Superfetch does this by preloading them in the memory. It also tracks your usage pattern for a better preloading decision. For example, if you open chrome in the morning, it will preload chrome in the morning hours, so that app load faster. But sometimes prefetch becomes a major cause of high disk usage. Here in this article, we will discuss how to disable superfetch in windows 10 and Windows 11.


Disable Superfetch / SysMain through Service manager


1.  Search Services in the Taskbar Search

2. Now, Choose Services.


Services Manager (2)


3. Locate Sysmain.

4. Double click on Sysmain.

5. Now, Choose Startup Type as Disabled from the dropdown.

6. Click on Stop to stop the service.

7. Choose Apply.


Superfecth Sysmain Disabled

Disable superfetch / Sysmain through command prompt

Step 1 – Open command prompt as admin.

Step 2 – Write the command code given below and hit enter.

sc stop "SysMain" & sc config "SysMain" start=disabled


Note: – To enable it again, just run the command given below.

sc config "SysMain" start=auto & sc start "SysMain"



Disable superfetch through windows registry

Step 1 – Press Windows key + R together to bring up run command box.

Step 2 – Write Regedit in the run command box and hit enter.

Step 3 – Now browse to the location given below.

  • CurrentControlSet
  • Control
  • Session Manager
  • MemoryManagement
  • PrefetchParameters

Step 4 – On the right side of the popped up box, find  EnableSuperfetch entry from the list.

Put one of the following values in  EnableSuperfetch depending upon your requirement.
0to disable Superfetch completely
1 – to enable prefetching when program is launched
2 – to enable boot prefetching
3 – to enable prefetching of everything

Disable Superfetch Registry Windows 10


If this entry is absent, just do a right-click the on the PrefetchParameters folder, then choose New > DWORD Value.  Name this EnableSuperfetch and do the steps given above.

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