pull down and right click menus disappear

When I click on a pull down (or drop down) menu or I right click for a menu, the menu briefly appears then disappears before I can click on a menu item. This occurs on certain software only, example Libre Office, VLC, GIMP, Firefox, Chrome, Microsoft Edge, Avast, Adobe Digital Editions and others but I have no problem with Adobe Reader, Audacity, Irfanview, Xnview, Notepad, etc. I also noticed that the busy icon is always blinking. Websites that have pull down selection boxes are also affected. Ribbon menus are OK so far. Also of note is that it only occurs as a standard user; admin user is not affected that is, all menus work fine and the busy icon does not blink. I have scanned with Avast and Trendmicro Housecall and there are no viruses. It occurs regardless of input devices (touchpad, mouse). I have tried rebooting several times. HP Pavillion dv6, Windows Home 10.

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Try a new user account.

And if Admin fixes it, use that.

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pull down and right click menus disappear

I prefer not to use the admin account. I set up a new standard user and when I tried to log in, it logged out by itself immediately so I couldn't log in. I deleted this new user and tried again another new user and it failed to log in again. Hmmmm.

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I worry the OS is damaged.

You wrote about issues with new accounts so now I worry the OS has been damaged.

Windows 10 has a rather nice reset that won't touch our files but that still doesn't mean we omit backups.

Given the story so far, fix it by going with what works or factory reset the machine.

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