I'd like to build a VMWare Fusion VM for just one purpose: running Quicken. I don't care about any other Windows apps or features. The only reason to keep Windows around for this machine is Quicken. Period. There are two approaches that come to mind. One is to use TinyXP. The other is a clean install of XP Home or Pro with nothing else added, plus possibly turning off some services. TinyXP: I've played with it a bit. I noticed in Task Manager that it's using 82 MB RAM on boot . That may be the way to go, but I don't know if there's any services missing that may be needed. Printing comes to mind as one. If I recall correctly I had to install printing support after the fact. XP Home or Pro: this is a known quantity, but may not be as efficient as TinyXP. It would be nice to have the Quicken file stored on the Mac partition so that Time Machine would do all the backing up. Any suggestions on how best to approach this? edit: if you want to discuss the merits of running Quicken or something else, please see Think running Quicken for Windows on your Mac is a bad idea - post here. Please keep this thread's discussion about optimizing a VM for Quicken. Thanks.