...to see if the corrupted Norton files are causing the problem.. You may or may not be able to do the uninstall from Safe Mode but either way, try to get it removed..

Next, if you can get on the internet, try clicking on either or both of the links below and run the free online scans they provide. They should tell you whether a virus is causing the problem.

Housecall Online Scanner

Panda Online Scanner

Next, download, install, update, then run the antispyware programs below:

Ad-Aware