visual studio 2010 crashes on startup

to solve this problem do following :

1. Stop Windows Presentation Foundation Font Cache 4.0.0.0 service (or kill WPFFontCache_v0400.exe proc)


2. Delete *.dat
   
   from XP - %SystemDrive%\Documents and Settings\LocalService\Local Settings\Application Data.
   
   Vista/Win7 - %windir%\ServiceProfiles\LocalService\AppData\Local\.


3. Reboot and you should be able to use Visual Studio.