The Bell Hath Tolled
"You acknowledge and agree that Microsoft may automatically check the version of the OS Product and/or its components that you are utilizing and may provide upgrades or fixes to the OS Product that will be automatically downloaded to your computer,"
The preceding verbiage appears in the EULA for SP1 for WinXP and SP3 for Win2K. This is it. The bell hath tolled. The tax-man is here. It's time to pay the piper. You must now decide: Will you deed your computer over to Microsoft, or wean yourself from your Microsoft dependence?