I recently upgraded from Windows 98 to Windows XP and noticed that my Norton Systemworks 2000 was not compatible. I decided to purchased Norton Internet Security 2003. During installation it advised me to uninstall Norton Systemworks. This I tried and tried to install Int Sec again. It refused on the grounds that Systemworks was still there. Searching Symantec site I found a program SYMClean which could be used to resolve this problem. This failed. Further investigations seem to show that there is an uninstal.isu file missing from Norton Utilities causing the problem. Looking back on the Symantec site I found the instruction on how to delete the files from the registry, but when I looked for the exact files to delete, they don't appear on my registry. I feel stuck now because I can't uninstall Systemworks - I can't reinstall it either because XP doesn't like it and I can't install any virus protection, which concerns me. Anyone got any ideas?