running winxp but googling took me here so i'm posting my experience and the solution that worked for me.
had the same issue.
couldn't even delete beacucqitear.exe in safe mode with Admin rights, which was located in C:\Documents and Settings\Rich as a hidden file ....if u search for the file, be sure to include both hidden and system folders
i downloaded Windows Defender Offline but when i ran the program, it said i was missing and needed to install IMAPI 2.0 which i did at Download: Image Mastering API v2.0 (IMAPIv2.0) for Windows XP (KB932716) - Microsoft Download Center - Download Details
after running the M$ update, my drive actually vanished!.....even tried to get it back in the Device Manager
/ DVD/CD-ROM drives
where the drive was being shown with a yellow exclamation point ie not recognizable or bad drive or missing driver
i tried to update it but nothing, so i uninstalled my dvd drive and rebooted thinking it would come back, it didn't.
i therefore ran a system restore from a few days earlier [Start / Programs / Accessories / System Tools / System Restore
and now everything
is back to normal and Norton is showing a clean computer.
even that beacucqitear.exe is gone after running a full search on it!