Recently i tried to uninstall one of my program via add/remove program but it failed to do so. I believe its because of InstallShield problem from what i read in internet. I also face the same problem installing ANY applications/games using InstallShied Wizard. I went to this site and downloaded the ISScript engine for the version of the setup file and still failed to install the application. I tried to update InstallShield version 220.127.116.119 last night, the installation was aborted because of same error. Last night i tried to install C&C Generals, the version of the setup file is 18.104.22.168, so i went to installshield site and download ISScript7.zip. I managed to install the script without any problem, after rebooting nothing has changed tho, still cant install/uninstall anything. Here's the error images. After clicking OK, the installation failed to continue and aborted. Maybe my Tuneup utilities messed up with registry keys i dun know. So what do you think ? OS is XP service pack 2. I googled for information for days and did all the solutions given still no avail. I tried Windows Installer CleanUp Utility but its only works with softwares that used the Windows Installer technology to be installed. I really blank now.. Thx !