http://www.vmware.com/ (http://www.vmware.com/)
You may have seen this product before, but I've just downloaded the 30 day trial of Workstation 4 and so far am very impressed. Just installed it on my XP Pro PC and am now running windows 98 as a virtual machine inside a little window.
Full specs here (http://www.vmware.com/products/desktop/ws_specs.html)
Oh, and there is either a windows download (will only run on NT, 2000 or XP) or a linux download too. I've got both, but as my linux knowledge is still lacking I've been unable to get a virtual PC to boot. I will keep trying though!
I will probably be getting this software, although it is pricey, because you can get a clean install of an os, then take a snapshot. You can then mess around as much as you like and if you bugger it up you can revert to the snapshot!
Will be great for me as I beta Microsoft's server OS and can install it without worrying about getting another PC.
I believe you can also set it up across two PCs to make a virtual cluster :-) We have one of our consultants coming up next week to show us how to do this :)
sweet. I've looked at this software years ago, but it wasn't as reliable as it is now. I guess with the massive advance in processing power this sort of software really comes into its own.
Some of our guys run this all the time on their laptops. If you are on a customer site and need to connect to their network for troubleshooting purposes then you do not need to admin rights to change your WinXP domain settings. Just boot a VMware session and pick an appropriate OS (a lot of them have a VMWare Win98SE as it is reliable)