Thanks a lot for chiming in with your solution. I started unpinning tiles and got my "Office" section that was pinned in the third column of grouped tiles all the way to the right. I decided to reboot before unpinning all the rest of my tiles and try to see if I could then pin a tile. Well, it worked. lol. So, I got to thinking it was a problem with a tile in that group. So, I started pinning them one at a time. After the first one was pinned, I could no longer pin any tiles again. So, I moved that group so that I only ended up with 2 columns of grouped tiles instead of 3 and low and behold I could pin tiles again. Come to find out, the real problem is you can't pin tiles if you have 3 columns of tiles. If you move whatever groups of tiles you have in the 3rd column so that you only have 2, everything works fine.