we are going to order a new windows xp media center cd. we will be installing into 2-3 computers.

my question is can we install from the same cd. now that microsoft is doing that WGA thing. will the same cd key work in all three computers.

am asking this because i had recently installed windows xp pro on one of the computers and used the cd key which i already had for last 2 years. everything went fine till the computer updated windows, then on start up i got this error

STOP: c000021a (Fatal System Error)
The Windows Logon Process System process terminated unexpectedly with a status of 0xc0000005 (0x0000000 0x00000000). The system has been shut down.


then everything would shut down.
we installed the windows again and disabled the updates. this always happenes after the updates.


is it something to do with the cd key. so far the key has been used 6-7 times before and the other computers have been running ok.

or do we tell microsoft before buying that we will be installing in more computers....