I back up my music related files to CD-RW and one of them will not open up. In fact, any time I try to access it, by shortcut to cdrom disc, explorer, or even if I boot the computer with it in the drive, the computer locks up. If I ctrl+alt+del, it says Explorer and Pcciomon- my anti-virus software, PC-cillon- are not responding. I'm thinking I may have a virus on it and maybe pccillon is causing it to lockup when it tries to access something on the disc. I'm afraid to disable pccillon and open it, thinking that it may release a virus if it has one. Any idea how I can fix this disc without risking something terrible? The disc appears to be in absolute perfect condition.