Should you run the installer in compatibility Mode in Windows 7?I would assume yes. Why waste time trying to load a 300mb exe and then have to do it again and again. Right Click on the EXE installer and you can set it manually or choose "Trouble Shoot Compatibiliy" My Acrobat Pro Trial installer supprised me that it picked XP service pack 2 as the Trouble shot mode. So it's probably better to go lower than Vista if possible. FYI: It warns not to use compatibility mode for any Anti-Virus software. " Do not use the Program Compatibility troubleshooter on older antivirus programs, disk utilities, or other system programs because it might cause data loss or create a security risk."