Help! Lost control, selections & scrolling rapidly changing

Terrypin · 09 Dec 2021

Hard to sum up in a single sentence subject. Typing and possibly mouse clicks occurring automatically. Asmost all apps affected. Couldn't use my usual Waterfox or Firefox to send this so I'm doing so in Chrome, which so far seems OK. (Hope I can Send this!)

For example:
Win10 Run box rapidly displaying all entries in the drop-down box

Excel: When freshly opened, all columns are being rapidly selected

Cannot scroll (in here too)

Most other apps behaving in similar wild fashion.

Control Panel > Mouse > Pointer Options > Motion (where I went looking for clues) immediately takes speed to extreme right and will not let me change it

Windows Security reports no action necessary.

Malaware scan found nothing.

Restarted PC, still the same.

steve108 · 09 Dec 2021

Try a different mouse and keyboard if possible.

Run Run SFC Command in Windows 10 to check for Windows issues.

Eksy61 · 09 Dec 2021

Terrypin said:

Hard to sum up in a single sentence subject. Typing and possibly mouse clicks occurring automatically. Asmost all apps affected. Couldn't use my usual Waterfox or Firefox to send this so I'm doing so in Chrome, which so far seems OK. (Hope I can Send this!)
Restarted PC, still the same.

Sounds like a problem with the keyboard driver. (What model of keyboard do you have?)
There is a Windows 10 keyboard troubleshooter, which you can find through Settings. Try to get your mouse to launch it.
If that fails, go into Device Manager, find the keyboard driver for your keyboard, and just delete it. Then restart your PC. Windows 10 will automatically reinstall the driver for it.

Terrypin · 09 Dec 2021

Thanks both. I'd tried the usual things: restart, sfc, reboot, shake keyboard to get rid of crumbs, press the buttons on underside of Logitech 660 wireless KB and the nearby receiver, uninstall keyboards in Device Mgr and restart. No joy. But after all that I then switched the ports to which the receiver was connected a couple of times, and after the latest restart normal behaviour was thankfully back. BTW there were (and still are) three entries in Device Manager > Keyboard, all identically but unhelpfully named 'HID Keyboard Device', which puzzles me. Why not just one?

Terry