I found that the "Professional" logo missing When I start up my computer.

I wonder it is cause by SP2 or not?

Inspiron 8500:
P4 2.5Ghz
512MB DDR RAM
60gig Ultra ATA HD
64MB NVIDIA GeForce FX Go4200
100Mb Ethernet
15.4" Wide Aspect Ultrasharp WUXGA

Windows XP Professional with SP2 updated