Well thats good... The 2004 update should not break anything either... It is a massive update...
The only thing that I noticed changed was windows power management went back to managing my USB ports...
Had to turn that off again...
How big is the 2004 update... When done it will show your OS as being installed on the day you run it...
But ProScan and everything else worked just fine after the install...
I had a backup image just in case though...