and I should have added......
Is the software Windows 7 Compatible?
- Please right click on the INSTALL EXE and run it as administrator when you install it.
- If you are still having issues change the EXE's compatibility to XP SP3 (by right clicking on it and altering the compatibility tab).
- If you are installing across a network or locally ensure that you have complete permissions.
Lastly, there are some other things that we can change re: compatibility that I'll talk about if the above fails.
EDIT: Something else important -> Make sure that the windows installer service is running by typing services.msc into the run command to open the services window. Then look for 'Windows Installer'. Setting this to manual, means that it will run as required (i.e. when you manually go to install something).
EDIT 2 (I really should stop and think before I post). At the bottom of this KB article are the steps for reinstalling the windows installer. It may be worth a shot if all else fails. http://support.microsoft.com/kb/315346