Good news, I've found a solution already. Thanks to the person who posted the idea of copying all files to the hard drive, that did not fix my problem but allowed me to find its source.
It was a problem with RPC stub, something to do with install shield I think, this had also caused problems with IE find function. Anyway if you have recieved 'Incompatible Version of the RPC Stub' or the previously meantion message at any time then go here:
This file sorted my problem out.