Re: Windows 7 problems
Most people running Windows 7 don't have issues with IE8 and Word (unless it's Word 95 or so, you didn't tell). So that must be some issue with your PC. That should be solved if there are no hardware issues and you do a clean (re)install of the OS.
Incredimail is one of the programs that tend to give troubles. But it could well be that it works flawlessly also on a nice clean OS. Worth a try.