When I try to drag a window, an icon, or a slider bar, it's as if the mouse cursor isn't catching it, or when sometimes it does catch it momentarily after a few tries, it lets go before I've moved it very far. I'm stumped. Could it be the mouse? the software? windows? It just started a couple of days ago, sporadically, and has been getting worse. I have rebooted, run sfc, scanreg fix. Couldn't see any pertinent control panel mouse settings to change. Any ideas of what to check or do would be appreciated.

Chas