Since I have downloaded new Windows 10, i cannot open Access database document. It just goes to a gray screen with the filename listed, and nothing else. Has anyone else seen this problem?

This error generally occured when you don't have access of that file over network or in connection string, it unable to reach the destination file. Talk to your network administrator.
For better suggestion on issues related with microsoft office access fix have a look to this thread: https://www.fixtoolbox.com/accessfix.html