I reinstalled it, and it is working ok, but that is what happened last time-- worked a while, then got buggy. Will wait a while before I try the diagnostic thingy. Will get back to you. Thanks.OK. Let's do this first.
Press your Windows key + the letter R. A box will pop up for the run command. Type Dxdiag in that box and press enter. Let it run to completion, click Save, and then upload the file here as an attachment.