The Perils of virtualisation
I just read an interesting article about Windows 7 - it will include a virtual machine to run windows XP for backwards compatibility.
The article points out that this has the drawback of extra maintenance.
I’d have to agree with this - it’s one of the big downsides of using virtual machines for testing - with three virtual Windows' I find myself constantly having to run updates.
One of the big wins of Linux systems is centralised updates for all applications - having to update windows, office, flash, firefox, java - all separately is a real pain even when you only have one machine to look after.