I have no idea what is wrong with my Parallels or how to fix it. Any and all suggestions would be appreciated. I am new to this system so step-by-step instructions/suggestions are helpful. I am on a MacBook. I open Parallels Desktop from my dock and then hit Start Virtual Machine. My Windows side loads up and I am able to start work. I open my document in Excel that I need to work on. I start working, am able to type for about 3-5 minutes before it completely quits without any error or warning. Then my entire computer is slow while it finishes quitting. Then I am back on the Mac side. This continues to happen every time I try to use Windows. Any suggestions??? Please help!