I have been running version 9 on XP (Pro) at home since last August, with no issues. I set two machines up at work with version 9 on XP back in Feburarry of 2002. We have had no problems. I have not been running in compatibility mode, just launching the programs. We just upgraded to version 11 at work, now the problems are begining. I left version 9 on both PC's, and on both machines, the uninstall feature has corrupted itself. IT is telling me there are no Corel applications installed on the machine, yet by launching the applications they work completely. On one of the machines, it lost the uninstall info relatively quickly, on the other machine it took over a week and a half to loose the info. I checked both uninstallers last week and they were there. In fact, I rolled back one of the machines last week, to just before v11 was installed, and the v9 uninstaller came back. About to do the same on the other machine, roll back, uninstall 9, then reinstall 11. On both machines since this has happend, i am getting unusuall errors within Windows and other Apps. I am going to check with COrel Tech support and see if they have similar issues, but I wanted to find out if anyone else experienced this problem.