XP Sp3 and X1 - SP3 install error

Decided to take the plunge and upgrade to X1 producer, forgetting that Windows XP was only on SP2 still, and the reason being that everytime I had previously tried to load SP3 I got the following error message:
There is not enough disk space on C:\windows\$NtServicePackUninstall$ to install ServicePack3.  Set up requires a minimum of 4 additional megabytes of free space, or if you also want to archive the files for uninstallation, setup requires 4 additional megabytes of free space. Free additional space on your hard drive and try again.

So X1 wants to see SP3 to install, and the SP3 installation still gives me the following message.  I've got about 30gig of free space on the C drive!

One important point which could be a factor is that my XP is set up via BootCamp on a Mac Pro (1.1 dual core Xeon)

Anybody got any ideas!  I'm going to try downloading SP3 and loading manually, rather than going through Windows update, but I'm not holding out much hope of that being any better!

Just to add to your (and possibly my) woes, SP3 is uninstallabe, so why it wants to "if you also want to archive the files for uninstallation, setup requires 4 additional megabytes of free space" is a bit of a mystery.

I've got to install SP3 tonight/tomorrow, although this is on a Windows machine and not via Windows update, but manually from the 316Mb download.

I'll let you know how I get on.

PLEASE backup EVERYTHING before you start - C: Drive, REGISTRY, system state etc.

What OS are you using Mike?

This might be relevant:

http://support.microsoft.com/default.aspx?scid=kb;en-us;292726&FR=1&PA=1&SD=HSCH

Ok, good news (for me)

SP3 installed without a hitch. I did a full system backup, set a restore point and simply ran the .exe (after copying it across from my internet pc to the DAW)

Rebooted, the inital boot took a little longer than normal, but no surprise there really, susbsequent boots were, if anything, a bit snappier than before.

Ran Sonar - panicked when my mains meters were clearly showing a signal, but nothing out of the Monitors, until I remembered I had to boot the Saffire BEFORE booting the pc.

After that, Sonar was back to normal, and like the OS, maybe just a little more responsive. Perhaps that's just wishful thinking on my part - but it's certainly no worse!

I've done several, lengthy editing sessions - V-Vocal tweaks, automation, exporting, bouncing etc, and even a bit of tracking, and all is well.

So that's my story lads - I'm now awaiting my copy of X1

I just had the add a line in the reg. made me nervous.
for me X1 has been well.....lets say, unpredictable.