office and mail no response

I use MS Office and Windows Vista. When Windows mail is open and I leave pc alone for a while the screensaver comes on. When I move mouse again I get message that Windows Mail is not responding. I have to restart pc. I get similar message when one of Office programmes is open. When all programmes are closed I do not get message. I disabled all sleep mode functions. Please help.

Theunis

Welcome to the forum

Here are several answers to your question.

Hope at least one helps.

MS Office doesn't respond after Sleep mode - Windows Software

It, does appear, that this is not an isolated error on your OS.