Question about WinXP

I recently installed WinXp Prof on my computer. Installation went fine and im running it atm.. Then I read on the winxp site that you have to activate it and after 30 days if you dont it wont work? I wasnt asked during installation like it said, and there isnt an activation shortcut under programs like they say... Is this normal?

It'll give you a prompt at the end of 30 days.

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Dell 4100 Case
800 Mhz Celeron
256 MB PC 133 SDRAM
10 GB Quantum Fireball 7200 RPM, 40 GB Maxtor 7200 RPM (I hate WD's) :p
32 MB DDR GeForce 2 GTS Pro
Sony CRX 1611 16x/10x/40x CD-Burner
Iomega 100 MB Zip Drive
Soundblaster 5.1
3Com NIC

Win XP