WinXP SP2

Applying the 275Mb monster to a couple of machines yesterday, I noted a few quirks. On one, it failed to detect the virus scanner; on the other, with exactly the same one, it found it OK; but failed to detect ZoneAlarm, and put the XP firewall on as well (leading to potential network issues). So in each case I had to shut the security centre up manually. So it's probably good for folks who don't have any security at all up, but is a nuisance in cases where you do.

Apart from that, the main thing that changed was on a Tablet PC, where the on-screen keyboard has changed from the pearlescent XP-silver look to something in a flat, dark blue-grey (both the password entry keyboard and the in-session one). There's also a new letter-cell input for pen input as well as the previous two choices. And it re-set the "do you want a tour of the tablet features" pop-up on each user account.