I'm not sure I get your request. If the problem is related to a browser infection, reinstalling your system should have fixed it or you should be able to make it works with another Web browser.
If you machine is clean and if the problem is rather with your MySpace account, I would suggest to to change your password on it and contact MySpace/Mobster support for further troubleshooting.
As your problem is most likely related to something wrong on a Web app, there is not much any Symantec product can do for you...