There no possible other ideas unless you are able to explain what happened before it started freezing, if you've done everything said here correctly, it should've solve your problem, but your problem isn't related to Parallels install, it's something else, maybe there's a window popping up asking for some input that is under another window or something like that. We can't help you unless you can remember what you have changed, installed or otherwise before you started having problems.
Also, what version of Parallels are you using?
Last edited by a moderator: Apr 3, 2013