Yes, Vista is sometimes unstable. My experiences with it: 1. I had Windows Mail that comes bundled with Vista just closes with no apparent reason. It is as if I clicked close on the window, but I didn't. 2, Next thing, and it happend to me 3-4 times in the last 10 month that I am using it, Visual Studio 2005 Team Edition freezes looking dimmed, and no way you can recover it. Even worse, at that time you can not even bring up the Task Manager to kill the process, and this is very strange as it should be available at all times. I have that update for running VS 2005 on Vista installed, so it is not related to that. 3. I select a few files in Windows Explorer, and press SHIFT+DEL to delete it entirely from the disk, it then deletes the whole folder. This has happened a few times, so it is not just a wrong key sequence. 4. Sometimes when I select files and want to copy or move them, I don't have a very clear visual on the files moving. This is really annoying, as my graphic card and computer rendering speed in general is very high. I have no idea if I target the right folder to drop the files to. 5. Sometimes it just doesn't see my DVD device. It says "Device blank" or something. I found in one MS forum that I have to go to Device Manager, uninstall the DVD device and install it again, but then it requires me to reboot the machine. Huh. 6. Many problems with apps and IE/Firefox disappeared after I blocked all instances of Adobe Updater with a firewall , and I mean each and every Adobe application that wants to update itself. Adobe is using many different ways (from running strange named instances to installing the updater under the account that has the permission to contact their site without ever notifying you), so I first thoroughly kill these. Clicking on "Don't notify me about updates" or such, is just a waste of time, it is a check box with no code behind it, it will always try to connect. 7. Many programs are still not compatible with Vista, and drivers too (even some HP printers and NIC cards). Besides that, it works like a charm :)