What I would do -

1. Check that everything is seated properly and blow out any dust, especially in the video card in case it is currently overheating.
2. Run chkdsk /r
3. Boot into safe mode and see if the problem persists.
4. If there are lots of file errors in chkdsk or if safe mode runs OK but normal mode does not, try running the System File Checker tool (sfc.exe). Maybe some system files got corrupted when the machine overheated and crashed.
5. Run a virus / malware scan.
6. Try a restore point back to a time before the problem started.
7. If it is still malfunctioning start swapping out parts to extent feasible to see if you can isolate the problem.

Usually when I get to the "swap out parts" step I take the machine to the shop - because I don't have the spare parts to swap in and out.

Good luck!

Mark



On 2/5/2015 8:43 AM, CollinB wrote:
Computer:  Dell t3600 2g ram, 500g HD, 2.8Ghz CPU, firepro v2900 2gig video card

Issue:  extremely slow boot up & behaviot.
Win menu is responsive. apps not loading or loading very slowly.
Will not load altCtlDel options screen to run task mgr.  Instead I get an error 
dialog.

Starting a cpl of months ago, when the system got hot the vid card fan would 
speed up followed by the screen going blank and resettling.

I am thinking this is all about the vid card.  Thoughts?


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