UPDATE to my previous post regarding Update KB3000850
After hours of searching the forums and getting nowhere, I noticed that the time was about 3 hours slow on my pc. I checked and time zone was ok so I changed the clock to the correct time, and immediately got a windows message that said I needed to sign in and verify my identity. I tried but only picture came up and no place to put in my password. After a half hour of searching for a place to sign in, I finally did a restart which appeared to kill it as it wouldn't come back up so I finally had to turn off my power strip. When I turned power strip back on, my computer came back up to the start screen, I signed on and everything I've checked so far seems ok now. No more "floating" in Excel and seems almost back up to speed! Now I have to wonder if the clock time is an indication of more trouble to come or just a one time incident, and could that be what was causing all the trouble?