Been having some issues with W7 over the last day or so and having trouble nailing it down. Hoping to bounce some ideas off you.
Sudden CPU spikes, during which system will hang and the cursor stutters, but will usually recover in a few minutes.
Screen randomly goes black for a few minutes
"Explorer" windows become hung up, by which I mean things like the task bar, task manager, start button, keyboard shortcuts, etc (Other applications usable during this time)
Much worse when running Firefox 26
This logged in to any profile, even a brand new one
This does NOT happen when logged in under safe mode
svchost process taking up an unusual amount of memory/CPU time
Actions I've taken:
Hardware diagnostics: All good
Full MSSE and MBAM scans, nothing turned up
Updated (rolled back, then updated again) video drivers (Have a NVidia DTX 560)
Uninstalled Firefox, using Chrome. This seemed to fix the short term CPU spikes, but system still goes off the rails after a few hours, with explorer.exe failing
Disabled the service the above mentioned svchost process was tied to. (SysMain) Superfetch. Much better performance for now
Ran system file checker (sfc /scannow) found no integrity issues
EDIT: Ok, so apparently it's not just Firefox. Firing up Mozilla Thunderbird caused the exact same symptoms, and hung the system for a good five minutes before it would kill the process. Wants killed, system is running smooth.
Edited by TheCaribou, 22 January 2014 - 02:06 PM.