This is a very recent/today issue that didn't exist this morning but was noticed later in the afternoon.
I have a WIn 7 Pro machine with MS Office Professional 2010, including Outlook 2010 installed and operating for several years without issue.
I have made no changes or installed any software other than a Windows update which installed itself recently.
This morning I received several new emails from know senders which I opened and in some cases replied to. This afternoon I received an email in the Inbox from a known sender. When I tried to open it Outlook crashed. I reopened outlook and everything else seemed fine, except Outlook hadn't retained my visual settings. The Outlook screen was smaller than I set it and Outlook was displaying on my left dual screen instead of the right dual screen, which is where I had it set. I could reopen and reply to any other email that had been opened previously (pre-crash).
I deleted the problem email, shutdown and restarted the machine and continued. The next time I received a new email, again from someone I email regularly, I tried to open it and once again Outlook crashed. Each time Outlook opens it is smaller, the screen is smaller and on the left monitor instead of the right.
Since the first crash this scenario has repeated itself for every email I receive on the Win 7 Pro, MS Office Pro 2010 machine.
I opened MS Office 2010 Pro and ran a repair but the problem persists.
I have several other machines (Win 7 and Win 8 Pro) in the Office running MS Office 2013 Pro and Outlook functions just as always on them. No issues receiving or opening new emails.
In the meantime I am running a Malwarebytes scan and a McAfee Virus scan.
Any other ideas on how to resolve this issue or what the issue might be