Reader Aaron Woolf tells us he was unable to validate patches for installation on a developer's copy of Vista pulled from MSDN. He writes, "My legitimate MSDN-acquired Vista Ultimate, which has been running, activated and validated for several months, now fails WGA." Others have reported similar difficulties.

How does this affect you?

If you use Windows, do your best to avoid anything that requires a ping to WGA. That means you should stay away from patches and add-ons until the coast is clear. WGA will not reach out across the Internet and deactivate your copy of Windows, but you should avoid talking to a WGA server for any reason.

For those of you doing installations and upgrades this weekend, we recommend that you avoid activation at this time. Remember that you can run Windows legally for 30 days without activating.