There was a typical long list until recently, and now they're all gone. I was looking for my scanner which isn't being recognised, although the printer (it's an all-in-one HP photosmart 8180) is recognised and will print. I've run driver updates, registry cleanups, and system restore but with no effect. Ach!
I have Norton 360; I'm assuming that has it covered. There have been no indications of malware. I wouldn't know how to run a command prompt, unfortunately, but I'll find out if need be. Thank you, John.
Just go to Start / All programmes/ Accessories/ then Right click on Command prompt and select "run as administrator". Then enter. A black box will appear. type in sfc/ scannow (note gap after /) than enter. It should run and check and correct system files. No harm in running SAS (Superantispyware) in spite of Norton.
Thank you John, I'll give this a go tomorrow.
There is nothing in device manager at all. I was looking in there for my scanner, that's how I saw it was empty. There had been some conflicts identified earlier which may have been the reason my webcam wasn't being recognised, but that had not been a priority so I left it. Then I wondered if they were affecting the scanner, so I went in to look. Can of worms opened!
Another recommendation has been to repair Windows; I'll try your suggestion first though. Thanks again.