Diagnostic Mode

As part of a much, much larger problem I'm having - I need to get my computer to start in diagnotic mode.  Problem is currently that on normal, safe mode and safe mode with command prompt I get nothing but a black screen and cursor.  No task manager, no command prompt, nada.  So I'm running the command prompt from the repair program on my windows disk.  

I did something wrong (tinkering around in windows, when I managed to coax it into starting up) but I don't know what.  Before, I could pull up msconfig and turn diagnostic mode on to restart my computer to make her go.  Now it says "You do not have sufficient privileges to run System Configuration.  Please run this utility as a user in the administrators group."  I'm not savvy on how to do this, and I'm not savvy on how to switch to diagnotic mode without using msconfig.  Help!
xyster311Asked:
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Forrest BurrisConnect With a Mentor Commented:
diag mode should be f11 or f12 on a vista box.. press it at the same place you normally would press f8. however, if i was in your shoes id be reformatting and reinstalling right now. looks like the virus damaged your kernel and if a repair doesnt fix it then there will be more problems down the road unfortunately
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Forrest BurrisCommented:
dont waste your time trying to get to diag mode if you're getting a black screen w/ black cursor. grab your vista cd and boot to it. run a repair on your operating system. let it go through the 20-30 minute repair and try again.
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xyster311Author Commented:
Vista thinks it's fine, I've done the repair (and I daresay every possible diagnostic that can be run pre-windows) at least a couple of times in the past few days.  I believe the problem is not boot-related, but rather somewhere between what Vista would consider booting and running smoothly.
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Forrest BurrisCommented:
ok let me ask you this then. since you've already ran a repair, are you suffering from the effects of malware? there is a boot loader called Bart PE you can download and burn to cd. it boots from the cd and then loads a dummy version of windows, allowing you to run virus / spyware scans, among a number of other troubleshooting applets built into the os.
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xyster311Author Commented:
This is sort of an after-effect of a virus that sports the name "Windows Privacy Center".  I was able to get onto Windows yesterday and run my virus scanner and registry repair program and successfully eliminated all of the malware which was causing the initial problems.  I had my computer running bascially back in full capactiy until I did something wrong (i.e. activated some service... downloaded a windows updated... I dunno really) and restarted again and I'm back to square one (but worse this time becuase my command prompt won't let me access msconfig).  I could try Bart, but I know diagnostic mode works if there is a simple bypass from my command prompt I'd like to try it - but if there isn't one I'll give that a try.
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