I had problem starting XP VM after upgrading to Parallels Desktop 5 but applying this http://kb.parallels.com/en/6873 solution I can start my VM Now I have another problem. After starting the VM the Parallels Tools installation start but after a loooong time the progress bar is full but nothing happen and it seam that the installation of Parallels Tools is freeze. There is a solution for this problem? Another question is about a the long time to start Parallels Desktop: I use a Mac Book Pro 2.5 GHz with 4 Gb of ram wint OSX 10.5.8 and Parallels Desktop icon bumps a lot of time before starting the program. Parallels Desktop 4 start more quickly.