Hello. I am currently using Windows XP SP2. I realized that I should update to SP3 for obvious REASONS. However, after updating and attempting to reboot for the changes to take effect, my computer can't seem to start. It gets about 1/2 way through booting up then attempts to reboot again.  I went into safe mode and was able to revert back to SP2. Also, while I was in safe mode, everything was extremely slow. I'm guessing after updating to SP3, my graphics card was essentially uninstalled.  Can anyone help me?What are your system specs? CPU / RAM / Hard Drive & Free Space

Why do you think it was video card related?Posting what I think is important from DirectX Diagnostic Tool

System:
Operating System: Microsoft XP Professional (5.1, Build 2600)
System Manufacturer: HP Pavilion 061
BIOS: Phoenix - Award BIOS v6.00PG
Processor: AMD Athlon(tm) 64 X2  DUAL Core Processor 4400+, MMX, 3DNow (2 CPUs)
Memory: 1022MB RAM
Page File: 650MB used, 1807 MB available
DirectX Version: DirectX 9.0c (4.09.0000.0904)

Display:
Device:
Name: ATI Radeon HD 4650
Manufacturer: ATI Technologies Inc.
Chip Type: ATI Radeon Graphics Processor (0x9498)
DAC Type: Internal DAC (400 MHz)
Approx. Total Memory: 1024.0 MB

Drivers: ati2dvag.dll
Version: 6.14.0010.6891 (English)
WHQL Logo'd: Yes
Mini VDD: ati2mtag.sys
VDD: n/a
DDI Version: 9 (or higher)

The only reason I think it's the video card is because every time I system restore or do some large change to Windows itself, it seems I have to reinstall it.

Edit: Forgot hard drive space. Here it is:
Used Space: 64.3 GB
Free Space: 160 GBI remember hearing a while back an issue with HP computers with AMD CPU's and SP3 update failures. Here is something to check into. Run this patch on SP2 prior to SP3: http://h10025.www1.hp.com/ewfrf/wc/softwareDownloadIndex?cc=us&lc=en&dlc=en&softwareitem=pv-60484-2

We were concerned about this issue until we ruled out that all our CPU's were Intel on our workstations at the company that I was system admin for.HP has rolled out a patch for certain desktop models with AMD processors EXPERIENCING failed upgrade and restarts. Go to this >link< for a complete instruction to get around your problem. Good Luck!Thanks guys. This solved my problem. Cool!