Regarding add/remove issue.

Check this LINK

You could also try CCLEANER,which offers three versions,I use the slim build.This program has a uninstall feature.

Also Add-Remove Pro

Maybe system restore will work,just a thought.

Regarding net frame work,mine is just like yours.You can delete older versions,but,in this case I didn't delete it cause it seems to me that the hotfix is an update.

"how do I delete the partition on my laptop?",don't know.

Tom