Note that disabling the service will marginally slow down app opening time, but that’s about it.ġ. So to fix the high disk usage in Windows 11, we need to disable the SysMain service. However, due to this feature, the disk usage sometimes gets high, as it’s engaged all the time while loading the program from disk to memory.Īnd from user reports so far, it seems the major reason behind 100% disk usage in Windows 11 is indeed the SysMain service. Microsoft has brought this feature to launch programs as quickly as possible.
SysMain, earlier known as Superfetch, is a service used by Windows 11/ 10 to preload apps into memory before you launch it.
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