alishathomaz :
Follow these guidelines::
Remove unused programs
Install and run antispyware software
Free up wasted space with Disk Cleanup tool
Defragment your hard disk drive
Disconnect unused network connections:
Click Start, and then click My Computer.
On the Tools menu, click Disconnect Network Drive.
Select the network drives that you no longer need, and then click OK.
Stop Unwanted startup programs:
Start > Run > write msconfig > Click on StartUp tab
Deselect the programs you want to stop
Thanks for the reply. The screen it hangs on is the one before I enter my password and everything is loaded. When it hangs here, the computer is doing nothing. The HDD LED never even flickers and the CPU fan drops to it's minimum speed.
I have no unused programs, and have not installed any new programs since it started up normally.
I've had "Super Anti Spyware" installed since the computer was new (July 24 '10)
I have 600GB free of 1TB on my system/programs drive and 900GB free of 2TB on my multimedia drive
Fragmentation is 1% on system HDD and 0% on multimedia HDD
I tried disconnecting all network drives, thinking the problem may be in a network computer, but no change
Since it happened immediately after a power outage and possible surge (but it's always had a surge protector and neither of my other 2 comps were affected), I was thinking it could be a hardware problem. One of my friends thought maybe the power supply but the voltages in the BIOS settings show +/- .02V of the desired.
One new thing I have to add...
I was leaving for vacation the morning after you responded, and copying some audio/video files to my laptop over the network. I was watching Gilligan's Island on one monitor and selecting files to copy on the other. I had started out copying files over my wireless network but after a few GB I decided I should plug my laptop into the network to speed it up a bit. About 30 seconds after I plugged my laptop into my router (I include this only because the HDD usage would have gone from 54 Mb/S to 100Mb/S, probably not related?), the audio started skipping, repeating the last 1/4 second or so. At the same time, both monitors went blank for a split second and then had narrow vertical lines on them. I had that happen twice before when I was overclocking my video card, but I restarted, backed off the OC a bit and it was fine since then (July '10). When that happened before, I was running SC2 on the highest graphic settings in 3D (dual DVI out for iZ3D monitor) at 1680x1050 resolution. I'm thinking video card now, and may replace it because I can only use 2 of the 4 outputs on it, I'd like to get one that I can have my primary monitor in 3D (2x DVI) and my second monitor used at the same time. There are other things I should spend my money on right now, but if the computer experts think the video card could be causing the delay at startup, I'll try it.