Can you post your DxDiag results to here specifically the following:
Operating System: Windows XP Professional (5.1, Build 2600) Service Pack 2 (2600.xpsp_sp2_gdr.050301-1519)
Language: English (Regional Setting: English)
System Manufacturer: HP Pavilion 061
System Model: DF253A-ABA A250N
BIOS: BIOS Date: 08/27/04 11:09:23 Ver: 08.00.09
Processor: Intel(R) Pentium(R) 4 CPU 2.60GHz (2 CPUs)
Memory: 1024MB RAM
Page File: 515MB used, 1945MB available
Windows Dir: C:\WINDOWS
DirectX Version: DirectX 9.0c (4.09.0000.0904)
DX Setup Parameters: Not found
DxDiag Version: 5.03.2600.2180 32bit Unicode
Card name: NVIDIA GeForce 6600
Manufacturer: NVIDIA
Display Memory: 256.0 MB
Driver Version: 6.14.0010.9371 (English)
Description: Realtek AC97 Audio
Driver Version: 5.10.0000.6160 (English)
Also have you checked out
this thread as well regarding UTC?
HTH
Dave