Updated to win 10 with no problems.  Then decided to revert to win 7.  After starting WLM  2011 using win7 had the following problems.

1. Doubled the number of emails in deleted folder but half of them had no message.  Those with more than 2 emails under same ID line could not be deleted.  "Empty Deleted Folder"  would not work.

2.  Two sub-folders had not message for each email and it could not be deleted.

Worked with MS level 1 Technician for over an hour problem could not be resolved.