A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Just wanted to let people know, after spending quite a bit of time online and realizing that most people point to Skype add-in or a few picture/video editor programs as the cause of this issue I found my issue to be caused by ZoneAlarm firewall. I found this after literally killing one process at a time in task manager reopening Excel and testing dragging a cell. Only after I killed ZoneAlarm did this stupid popup stop, not sure what ZoneAlarm is doing that causes this but it must be something in their most recent update because I've used this firewall for many years without any Excel issues, including 2010 until about 3 months ago when my HDD crashed and I had to reinstall everything, which is when this issue came up. Now that I've found the program that causes it, I'll research which setting because it seems weird that a firewall would need the clipboard.
Thank you for your input, this clipboard problem has been driving me nuts. As soon as I read this I checked if Skype was running, it was (autostart) and as soon as I killed it my clipboard problem went away. This was only a problem with my Excel 2013, I also have excel 2007 and it worked without an issue.