Some of you have had problems installing Revit.  Perhaps running the Program Install and Uninstall Troubleshooter via Microsoft Fix it portable will help?

I recommend using the following link. After downloading, you will have to run the exe, which itself will then download ‘Fix it portable’ to a folder that you select:
Portable Offline: MicrosoftFixit-portable.exe

In the top list, click on Install or upgrade software or hardware, and click ‘Run Now’ next to Diagnose and fix program installing and uninstalling problems automatically.

Program Install and Uninstall Troubleshooter Tool Replaces MSICUU2 | Raymond.CC Blog

“as we look forward to the next generation of Windows systems, which will come out next year, there’s a whole lot more coming. As we progress through the year, you ought to expect to hear a lot about Windows 8. Windows 8 slates, tablets, PCs, a variety of different form factors.”

Steve Ballmer: Microsoft Developer Forum:

So it looks as though Windows 8 may be available as soon as 2012.

However, Microsoft then released the following statement:
“It appears there was a misstatement. We are eagerly awaiting the next generation of Windows 7 hardware that will be available in the coming fiscal year.  To date, we have yet to formally announce any timing or naming for the next version of Windows.”

What’s the truth?