|Contact bell south maybe.|
Try to fix the install rather than re-install it.
Try to un-install the program, might have to edit registry and remove hidden files. Almost all uninstall programs do not properly remove applications.
Test CD/DVD drive, might be going bad. Use usb external maybe.
Might have to do clean install of xp and try again.
"Best Practices", Event viewer, host file, perfmon, antivirus, anti-spyware, Live CD's, backups, are in my top 10