Every time I try to install hamachi a message comes up saying 'username' is not a valid short file name. The only option I have in The box is to click OK after that The hamachi installer appears and say The installation ended prematurely. I did have hamachi installed to a drive I have on my computer before but The drive broke and I have to replace it now I can't install hamachi on my new drive. I went into offline files and tried installing it with the options enabled then unenabled it didn't make a difference, I went to uninstall or change a program and hamachi was there but it wouldint let me uninstall it it just gave me the same message (not valid short file name). im on win7 what can i do to solve this problem or at least get hamachi working?