Since about two weeks, I've been having a problems with my taskbar. I've always preferred having my taskbar at the top of the screen. Somehow for the last 2 weeks, the taskbar location on screen returns at the bottom every timeI reboot my system. Even after I made sure to click on apply after making the change in Properties.

My second problem is with Windows Explorer,which use to keep the appearance I wanted it to have (i,e with of columns, location on the screen etc...) Now every time I click on a drive of folder the size of the column is reduced and I keep having to readjust it so that I can see what's in that folder. It also does not return to it latest position when I recall it.