Do I install service pack 1 before 2

What OS XP? no you can go right to SP2, but you need SP1 or SP2 installed before you go to SP3
 
If this is XP, just go right to SP3. If you don't have a slipstreamed copy, now is the time to get AutoStreamer and make one.
 
The only Windows I knew that required a previous service pack be installed before a more recent one was NT4 with SP4->6a
 
I'd be very surprised if you had to have sp2 before upgrading to sp3. http://support.microsoft.com/kb/950717 gives some details on what to do, but makes no mention of needing any prior service pack.

anyway, original question... sp 1 before sp2? I'm pretty sure I've gone straight from xp no sp to xp sp2 many times.
 
If you mean Vista; yes, SP1 must be installed prior to installing SP2.
 
He's probably talking about Vista. And as the others have said, yes, SP1 first. Just installed SP2 myself. Running good so far.
 
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