HOW TO get WinXP SP1 fully patched:

1. Download & save the installer for WinXP SP3 to your desktop:
Click here

[Yes, you can skip WinXP SP2 altogether.]

2. Read & heed:
This contains some important information: Click here

3. Logged in as Administrator, if necessary, double-click on the saved file
to install WinXP SP3. Follow all prompts; be patient, and reboot twice when
the install completes.

4. Do Resolution Method 2:
Click here (trust me)

5. Go here.| Install any required software
then click on CONTINUE | Select CUSTOM and scan | Install any critical
security updates offered. Again, follow all prompts.

[I do NOT recommend installing IE7 via Windows Update.]

6. Make certain that Automatic Updates is enabled; cf.
Click here

Addtional References:

Free unlimited installation and compatibility support is available for
Windows XP, but only for Service Pack 3 (SP3), until 14 Apr-09. Chat and
e-mail support is available only in the United States and Canada. Go here.
| select "Windows
XP" then select "Windows XP Service Pack 3"

Protect Your PC!
Check out Microsoft's tips on how to keep your PC secure here. Check out my recommendations here.

Learn how to protect your PC by taking three simple steps
Microsoft's Tips