Recently, Parallels desktop (winxp) stopped launching on my MAC Leopard , so I uninstalled and cleaned out all parallels files as suggested, including running the disk utility -repair permissions.. Then I reinstalled, but I'm getting the same error message that it quit unexpectedly. PLEASE don't ask me to purchase an anti-virus program for my MAC side because that's the reason I purchased the MAC in the first place. I had an anti virus program on the windows side (ESET). Once you can give me a practical way to make parallels work again, then I have to convince Microsoft and ESET to give me new licensing keys to make their programs work. What a hassle!