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PC freezing up intermittently
Hi,
I have been having problems with my Win7 x64 PC freezing up and would appreciate some input...
The problem is that every so often (not at all consistent - sometimes twice a day, sometimes all is OK for a day or so), all the open applications start to freeze up, until pretty soon I can't even open Task manager with Ctrl+Alt+Delete (or it takes several minutes to appear). I can move the mouse cursor on the screen as normal - it doesn't 'stick' as with an Explorer crash, but that's it - apart from the little blue 'circle' rotating. None of the desktop icons react when I hover the mouse over them and eventually the Intel CPU Usage app on the desktop stops responding too. (Before it does, it shows CPU usage - an i7-4790 @ 4GHz (not overclocked) - has dropped to 0% on all cores). If I manage to get to Ctrl+Alt+Del quickly enough and get the red icon to close down the PC, that works, but it is up to 10 minutes before the PC does shut down.
Nothing at all shows in Event Viewer that I can see, only references to the forced shutdown I made.
I thought initially that it was something to do with MS Flight Simulator, (the PC is used almost exclusively for that and has little software that is not connected with that programme installed on it), but yesterday the PC froze as I booted - just as the desktop was loading: the icons all remained white and I eventually had to push and hold the restart button.
The thing is, this is very intermittent. It's been happening for some weeks though, so I can't link it now to anything I may have done to cause the problem. System Restore points that pre-date the issue are long gone. I do have a C drive image made a month or so ago, but that's a last resort. The problem may not be software-related anyway.
So far I have:
1. Run SFC - no issues reported.
2. Checked core temps - all pretty low (about 30 degs at idle, 65 degs under CPU testing, all cores running at 100% for several minutes)
2. Run IntelProcessor Diagnostic Tool - all tests passed, max temp was 25 degs below max
3. RunMemTest86 - three cycles. All pass, no issues reported. (16GBs of RAM installed).
4. Benchmarked the GPU - GeForce GTX970. Score = 69 / 2875. (Min fps = 33, max = 153). Not sure if that proves much though?
5. Run Samsung Magician - the PC has 2 x Samsung Evo SSDs, 500GBs each. No HDDs. But am not sure how this gives a 'health check'. The results don't seem to be anywhere near those I find when Googling - they are up to 10 x higher! I guess I am misreading them?
Disc 1 Seq. Read = 5,241 MB/s, Seq Write = 616 MB/s, Random Read (IOPS) = 278,118, Random Write = 10,032
Disc 2 Seq. Read = 5,397 MB/s, Seq Write = 427 MB/s, Random Read (IOPS) = 279,377, Random Write = 10,021
What do those figures mean?
Still to do:
Check for latest Windows Updates
Run Checkdisk
Delete and recreate the Page File (relevant here??)
Try different graphics drivers (?)
.. do those last three seem reasonable in the circumstances (could they possibly be linked to this specific issue?)
In the meantime, if there are any suggestions, thanks!
Martin
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but unlikely.
