You may experienced an error when installing Windows 7, “Windows could not parse or process unattend answer file [C:\Windows\Panther\unattend.xml] for pass [specailize]. The answer file is invalid.”
There could be several reasons for this error and the best place to start looking is in the Windows Setup log file in C:\Windows\Panther. In this case, I found the following error in the setup log.
<ComputerName>MENDTVMware-50 0e 64 8d bd df 91 77-98 ee 3b a4 bb 58 7b b4</ComputerName>
Windows has a limit of 15 characters for the computer name. To resolve this issue, you may want to reconsider your PC naming convention strategy in your organization. 🙂