Computer started freezing frequently. Please help :(

Hello All


For the past week or two I have been experiencing problems with my computer, can anybody help me find what the root cause is so that I can fix it?


The problem is that every now and again (30-60 minutes of use) my computer appears to freeze, EX: the screen is fixed and I cant move the cursor and nothing on the screen changes, the PC does not seem to react to keyboard input: CTRL+SHFT+ESC for example. I have noticed at least once (while playing a game) that the sound that was playing when it occurs tends to loop.


When this happens all I can do is switch the PC off from the Power Source - wait 10 seconds and replug and boot. If I try to boot without unplugging from the Power Source - the PC fails to boot asking me to put in the Windows Disk.


This issue occurs in different types of use, sometimes when I am playing 3D games, sometimes watching youtube or even reading the BBC news. No events are logged which give indication to what is happening.


SECONDLY: On some occasions when I leave my PC idle - I come back an hour later and it has rebooted itself (No BOSD Logged) to the Boot Failure Menu.


I have had one blue screen in the past 2 weeks (DPC Watchdog Violation) which seems to point to my SSD, but I cant figure out how to fix it - or if that is a secondary issue. Unfortunately as my SSD is only 64 GIG when i did get the BOSD, it didnt store it due to the space remaining on the disk (16 GB)


I have tried to attach my system event viewer (Cleared prior to this latest incident) in the hope it might help but the uploader says its an invalid file .


Can anybody help me to find out what is wrong?


Thanks, Tom


Additional Notes


OS: Windows 8.1 (Installed on Release Day, Never had problems with 8.0)
GFX: Nvidia 550 TI
Disks: SSD (Crucial M4 64 GB) (OS Install), 1TB (Hard Drive storing games and files on software partitions)
8GB Memory (tried reseating)
PSU: 700 WATT
I know the issue isnt heat related as I have monitored this.


I THINK the problem may have started a week back when I installed the latest NVIDIA Drivers - I have since uninstalled and reinstalled them, all my PC Drivers are up to date. to reduce load on GFX I have unplugged my main monitor.


I have run Malwarebytes, SuperAntiSpyware, Windows Defender (My AV), RogueKiller, TDSKiller - several times, no viruses/rootkits, the occasional ad tracking on SuperAntiSpyware probably due to internet browsing.


I have no windows updates pending.

Please provide this information so we can provide a complete analysis (even though BSOD's don't seem to be a problem): http://www.eightforums.com/bsod-cra...e-screen-death-bsod-posting-instructions.html

Also, Please do the following:
- open Event Viewer (run eventvwr.msc from the "Run" dialog))
- expand the Custom Views category (left click on the > next to the words "Custom Views")
- right click on Administrative Events
- select "Save all Events in Custom View as..."
- save the file as Admin.evtx
- zip up the file (right click on it, select "Send to", select "Compressed (zipped) folder")
- upload it with your next post (if it's too big, then upload it to a free file-hosting service and post a link here).

Please note the requirement for ZIPPING the file up. That is required because most file extensions aren't allowed (for security reasons).