Quick Launch bar won't take icons

Today I had problems getting my system cleaned out of Adobe's Creative Cloud and reinstalling an old version of Photoshop. When I was done, I went to add the PS icon to the Quick Launch bar but I got the red circle with the bar across it. Same with any other icons. The ones that are already there work fine. I have googled the problem but can't find a solution. With carpal tunnel syndrome, I have a lot of icons on the Quick Launch bar to avoid extra clicks. Any help gratefully received!

Hi, Ken,

Yes, Quick Launch being the bar at the bottom. I had already tried all those and nothing works. And in case anyone wonders if the toolbar is locked, no, it isn't. If I can't resolve this, I'll have to figure out making a macro.

Hey ccbrundage,
Are your referring to a Quick Launch Tool Bar, which sits on the Task Bar ?

Not sure if it matters what you call it - it's where I drag all my icons I need to open quickly. If people are happier with me calling it the Taskbar I will.

Sorry - didn't mean to upload 2 images.

No worries, I was just double checking :)

I used System Restore which I try to avoid since a time when it crashed in the middle of restoring and I ended up with a major problem. But this time it worked and my icons are able to be moved onto the taskbar. Many thanks for the suggestions and time!