Turn off any virus checking software. That Are Run on the Computer. Start the InstallShield installer and check the TEMP folder. The InstallShield might take several minutes to start working. If this process doesn't work, back up your data, reformat the hard disk, and reinstall all files.
Computer stops responding due to large system environment variable values .
Another workaround is to close Outlook 98 before running Setup.exe. Generally, you should not have any other applications running when you run an installer.