Netfx20sp1 Upd Work Info

: SP1 provided essential prerequisite support for upgrading to or running applications built on Microsoft .NET Framework 3.0 SP1 and 3.5.

Then manually reboot with shutdown /r /t 30 . netfx20sp1 upd

The generic name netfx20sp1 upd is often renamed by third-party sites. To know precisely what you are dealing with: : SP1 provided essential prerequisite support for upgrading