VMware to Virtualbox - Help !

I'm desperatly trying to do away with VMware so that instead of dual booting I can just use Trisquel.
I have found how to do it BUT not in total.
Problem - In vmware if I go into Snapshot manager it shows Windows 7 then a circle saying 'you are here'
Now copying all the files/folders to Virtualbox Windows, runs OK but Virtualbox does NOT run the latest version of Windows.ie it is missing a couple of programs that I recently installed.
Anybody know how I can resolve this problem please.