Hi I am running XP pro service pack 2 with avg virus scan, avg spyware scanner and zone alarm fire wall. The problem that I have got is that I cannot run any .exe files from my cd drives. I can open the disks and see their contents but it will not run. Audio cd,s dvd,s play ok. The icons for disks put into the cd drives show in my computer. The error message "the handle is invalid" always comes up. I have 2 cd/dvd drives and it happens on them both. I have tried disabling avg and zone alarm but with no joy. This has only recently begun to happen. Has anyone got any ideas?