Okay, First off, i wud uninstall norton stuff completely...then
Some members in here had problems with virii blocking their cd-rom drives. There is 90% probablity that [hmm..might be 100% ] that your system is infected with lot of virii/adware/spyware/trojan. Norton doesn 't keep all of em out.
The above 2 links should start you off in the right direction...
If you are tired of reading the above 2 links, get spybot,adaware,avast ,update them . Goto safe mode and clean your system with these softwares..