you need to provide more info. The blue screen --even though it may look like gibberish-- has useful information. Look at this example (it will be different than your error, but the format is the same):

http://en.wikipedia.org/wiki/File:Windows_XP_BSOD.png

Post the info from the top of your blue screen up to the point where (in the example) it says PAGE_FAULT_IN_NONPAGED_AREA. Again, your error may or may not be a "PAGE_FAULT...". I would just need the information in that first paragraph.

Now, go back to the example I linked above. Look at the bottom where it says "*** STOP 0x00000050..." Post YOUR STOP error, and any reference to a particular file, like in the example where it says "SPCMDCON.SYS" (your file --if any shown-- will no doubt be different, but post it.)