Vista upgrade to Win7 caused VS2008 failure

weekend, upgraded his notebook from Vista to Windows7, the reason for the upgrade is not want to reinstall the driver, vs, sql and other software, it is lazy to choose the upgrade, the upgrade time It can still be tolerated. In the process of upgrading, Windows 7 self-tested some programs that are not compatible with it, such as several programs that come with Thinkpad, iTunes, and the last thing you want to see is Sql Server 2008. Anyway, no matter what, upgrade first, then upgrade and find a solution.
After a night of tossing (the computer is on, I slept), I looked up at the computer in the morning, after some simple system configuration, entered the system interface, not bad, no other mistakes, this time put Try each software, Office, Sql Server 2008, Chrome, SaaYaa, Fireworks, and so on, there is no problem, my heart secretly hid a bit. However, when I open VS2008, the following error message pops up, please see the picture:

I guess this error occurs because the hard disk space is insufficient during the upgrade. I deleted some Program Data in the C drive. The file inside is caused, there is no way to let my hard drive split small, 40G partition is not enough. There is no way, only google search has no results, luck is not bad, really let me find a solution, here again thank google, and foreign cattle. Just enter a sentence on the command line, of course, you need to enter the command line program as an administrator, execute the following statement:
Run "%programfiles%\\Microsoft Visual Studio 8\\Common7\\IDE\\devenv .exe" /setup
After this sentence is executed, the problem is solved.
The purpose of writing this article is actually two:
1, Vista Ultimate can be directly upgraded to Windows7 flagship version (this nonsense)
2. In case of upgrade, VS2008 is missing The Application Data Folder can't be opened, so you can use the above sentence to solve it.