Posted this request for help a few days ago but all suggestions failed to solve the problem. I'm hoping there are some more technical whizz kids about today!
Here it is....
When I either try to open an html file by double clicking straight onto it or simply select it by either clicking on it once or drawing a box around it with the mouse pointer, a message pops up saying that windows explorer has encountered a problem and is closing down! This closes the open file but nothing else.
I can however still open html files in Dreamweaver no problems and even select html files in a folder by using the 'select all' option from the folders 'edit' menu.
To put a link into this posting, go to your old posting (should be easily found in your 'my postings' list) and highlight the whole of its address which appears in the toolbar at the top of the screen. When the address is highlighted, press Ctrl-C (or click Edit/Copy). Then go to this posting and start a new response, and paste (Ctrl-V) the address that you've just copied into the text. The forum software will automatically convert the address into a 'Click here' thingy.
'fraid I've never had to repair Windows, so I'll have to leave it to someone else to answer that question.