Error message: "Object Reference not set to an instance of an object"

Hello all!

I just finished a project on SDL Trados 2017 and while I was trying to shut down SDL and then windows I get the above-mentioned error message. The problem is that I cannot find my memory of the last project got an instant message "you memory may have been corrupted" also I cannot shut down neither trados nor windows. Any suggestions?

Thank you so much in advance!

Virginia