People visiting my blog in the last few months might have expecting strange behavior like white screens when loading pages other than the home page. this was caused by a PHP version which made the Apache web server crash all the time. This was solved now by installing a new PHP version and all is fine again.

Still, my employer thinks using Windows XP Pro is a good choice, so I have to deal with automatic updates and nagging screens appearing every 10 minutes wanting me to reboot the system. Which is kind of nonsense, because I usually started the damn thing only some minutes before the updates.

If you want to disable it forever, do the following:

Start
Run
gpedit.msc
Local Computer Policy
Computer Configuration
Administrative Templates
Windows Components
Windows Update
Re-prompt for restart with scheduled installations.

For Windows 2000, it's buried in the registry:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU]
"RebootRelaunchTimeoutEnabled"=dword:00000000
"NoAutoRebootWithLoggedOnUsers"=dword:00000001

To let the nagging screen disappear (until the next reboot, if you don't apply the tip above):

net stop wuauserv