Clear temp folder once.
Restart the computer and check.
Fuse CC is a large app compared to others , so it will take sometime.
If all steps fails , try downloading from Direct link. The method is mentioned in below link :
The specified item was not found.
Gonna check that later cause download Photoshop at the moment, but wanted to ask another thing, Fuse CC ( Preview ) means that it's gonna be free for a while? Or is it gonna stay free for the people who get it now?