Last week, the Windows Explorer disappeared, and I could not get it to pin back. I finally found some place that had a check list of items pinned to the taskbar. Explorer was still marked, I unmarked it, closed everything out, (said oh s**t, I'll never find that again), tried successfully to repin the icon. This morning the icon had been replaced with a white broken folder, the one with the two squiggly lines through it, and would not work. I clicked on "unpin", now I can't get it it pin back, and of course can not remember where I found that screen that worked. I have been on so much pain medication the last month or so my memory has not been so good.