As Microsoft’s Update Product Team blog explains, a series of fake updates will be pushed out from May 12 to test how the update system copes with a large number of users on a new operating system:
We need to verify the update infrastructure to ensure that when we need to release real updates, the process will run smoothly. There will be at most 10 updates, and as before, they will not deliver any new features or fixes.
Windows’ Update process often comes in for deserved criticism (multiple reboots, anyone?), so it’s good to see that the system is actually being tested. We can only hope that the “fake” updates don’t chew through too much of our precious bandwidth allocation.
Upcoming updates for Windows 7 RC [Microsoft Update Product Team Blog]