Numerous problems after upgrading from 8.1 to 10. When selecting favorites in browser, the drop down box showing favorites appears, and before I can select one it disappears. It happens many times with 2 different browsers. When logging in at a web site, the keyboard input stops before I finish typing. Problem typing this message, it stops before I finish typing and leaves some letters out. Same thing typing a word document. Everything was fine before the upgrade to 10.