I have had no problems either and I too run XP Pro and Home and have several machines with ver. 11 on them. However, where I buy my computers, and they work with them every day, they told me they have had instances where ver. 11 corrupted some files so badly that the OS to had to be reloaded. This is more than likely a very isolated instance admittedly. It only becomes serious when it happens to you so still I believe creating a restore point is a good idea.