Installation failed with error code: (0x80070643), Fatal error during installation for VS 2008

While I was installing Silverlight. I got following error.

Problem:

Exe (d:\d7baf3d2979ba5016553d37455c7664c\PurgeSLTCache.exe) succeeded.
Exe (C:\DOCUME~1\JAIPRA~2.SIL\LOCALS~1\Temp\Silverlight Tools RTW\Silverlight.2.0_Developer.exe) failed with 0x80070643 - Fatal error during installation. .
Exe (d:\d7baf3d2979ba5016553d37455c7664c\PurgeSLTCache.exe) succeeded.
Final Result: Installation failed with error code: (0x80070643), Fatal error during installation.

Solution :

1- After installing VS 2008 SP1 restart your system.
2- Remove all the previous version of Silverlight.
3- Run setup again

It will work.