Iwas asked by Spyware Doctor if I wanted to block MSIExec.exe until the next startup and I said yes (stupid me). I have restarted XP a few time since then so it should not be blocked but who knows? When I tried to install a freeware program it said that Microsoft Installer was not working. Spyware doctor shows no blocked programs. When I tried to install a program from a cd that had previously been installed it intitially show it being set up for installation and then nothing happened.