96% Disk usage?!

[Computers Taste Like Metal]

I was playing rust and I crashed, I checked my disk usage and one program was using it and it was "service host local system"

 

[Zerk2012]

http://answers.microsoft.com/en-us/windows/forum/windows_8-performance/a-process-called-service-host-local-system-is/8cb5b527-8ef1-4e8a-8ad1-a9eada572ebe?auth=1