Jump to content


Register a free account to unlock additional features at BleepingComputer.com
Welcome to BleepingComputer, a free community where people like yourself come together to discuss and learn how to use their computers. Using the site is easy and fun. As a guest, you can browse and view the various discussions in the forums, but can not create a new topic or reply to an existing one unless you are logged in. Other benefits of registering an account are subscribing to topics and forums, creating a blog, and having no ads shown anywhere on the site.

Click here to Register a free account now! or read our Welcome Guide to learn how to use this site.


Odd recent sudden issues with W7

  • Please log in to reply
1 reply to this topic

#1 TheCaribou


  • Members
  • 10 posts
  • Local time:12:34 AM

Posted 22 January 2014 - 01:51 PM

Hi all-


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.

BC AdBot (Login to Remove)


#2 Greg62702


  • Banned
  • 717 posts
  • Gender:Male
  • Local time:11:34 PM

Posted 22 January 2014 - 02:08 PM

Anything odd showing in Administrative tools > Events?  You could try running Process Monitor http://technet.microsoft.com/en-us/sysinternals/bb896645 to find the problem child.  As for turning Superfetch off, I wouldn't.  It needs to stay running.


You can also use Process Explorer, to see which sub-process is causing the spike.  http://technet.microsoft.com/en-us/sysinternals/bb842062.aspx

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users