Error show when using any app need .Net Framework

[RYU81]

I try to uninstall,also clean tool for .Net Framework for all versions (1.1,2,3 & 3.5) and install it again but no luck.

[cluberti]

Is it always "provider load failure"? Have you considered running process monitor from sysinternals while launching the app to see which provider load failed, and perhaps why?

[RYU81]

Show many reg files not found them.i don't know why not there or deleted?