I would almost bet that one of your CD/DVD copying/virtual drive software may be the issue
You would have to make sure that they are all the latest versions
and check out their version histories for fixes
I'm not going to track down the makers websites for updates or fixes
I'll leave that up to you
Geesh, I'm not sure where to go from here
A clean install would help with this many problems your having
But I wouldn't go installing all that copying software all at once
You could try uninstalling all of it, reinstall one at a time, give it some time to see which one could be the problems
I actually wanted you too earlier uninstall ALL copying programs, including copyprotection programs you install
BEFORE install Service pack 2
They very much could of interfered with the install
I think I can find about 4 times you said the computer crashed when you were copying a DVD or CD
Again, as mentioned, check with ALL the makers websites for issues with their software before installing it!!!!
Have you checked for errors in
Go to start>>run>>type in
eventvwr.msc
For recent error messages that may give a clue
As you mentioned, you could check out your memory
Download
Memtest86 v3.2 ISO image (zip)"
from here
http://www.memtest86.com/Unzip the contents within and then burn the ISO image file to a CD and bootup with it to check your memory
This test can take some time
Remember to set the bios to boot from the CD first