Here is a fine bloke who did what I have been dreaming of ever since I got my new Dell D830: he upgraded his Windows Vista installation to Windows XP.

Although my own Vista installation runs a lot better than his, I do see a lot of familiar problems he seems to have fixed with his upgrade.

In addition, numerous tasks that take a long time on Vista have been greatly speeded up. File copies are snappy and responsive, and pressing the Cancel button halfway through actually cancels the copy almost immediately, as opposed to having it lock up, and sometimes lock up the PC. In addition, a lot of work has gone into making deletes far more efficient, it appears that no more does the operating system scan every file to be deleted prior to wiping it, and instead just wipes out the NTFS trees involved, a far quicker operation. On my Vista machine I would often see a dialog box from some of my video codec’s pop up when deleting, moving or copying videos. No more, now all that is involved is a byte transfer or NTFS operation.
Automatic Updates has also gone through a performance facelift in that it no longer hogs your bandwidth when you’re surfing, a nice touch.

Link.