Questions regarding Virtual Machine errors

Hi experts,
I got the some queries regarding test complete installed on 10 VM machines.
Is it good to develop test scripts using Virtual Machines?
Virtual Machines have a break point. Recently, it reached its break point as I debug.
However, the screen frozen and needed a restart after I deleted the test complete. exe file.
The error message looks like this:

I keep receiving an error message saying "Error-AD fs2.0 Management. An Error Occurred during an attempt to read the federation metadata. Verify that the special URL or host is valid. Federation data endpoint."
Any help is highly appreciated.
Thanks.
