Aspect ratio change to being stretched after running CCleaner's new version 7

I asked Samsung for a Window’s 10 display driver and their 2nd Tier level said they didn’t have one. The display was just perfect for many years until I ran version 7 of CCleaner this morning. Now the display is off. Circles are not round and squares are not square. It seems to be stretched horizontally after the clean. Rebooted everything. I have un-installed the Windows display device using task manager without results. I’ve used a Samsung 4k UHD TV for my entire entertainment center for years with much satisfaction until now. It is not the TV. It plays 4k UHD DVDs from a 2nd source Blue Ray DVD player with correct aspect ratio. It’s the Window’s 10 OS that CCleaner ver. 7 changed and/or deleted something this morning. I found both my browsers to also be not working after that CClean. I had to uninstall both browsers as well. Somehow, Microsoft’s Edge survived and allowed me to download and install fresh versions of Google Chrome and Brave back to working again. But of course, I lost all my bookmarks?? Not a big deal, but GZ will be a pain in my A to recover from. Can anyone here help me out? I will continue to research other resources, but CCleaner 7 was the cause of my Delma. Or it was me not noticing or aware of what their new defaults were set to after their upgrade that I should have reviewed and maybe turned some off? Unknown yet. Has anyone experienced this behavior? I’ve had CCleaner for years and love it and never had an issue until now. I very much have that feeling of “I should have, would have, could have, backed things up?” OMG do I have. LOL…. We’ve all been here, done that. It happens. Please someone help me out if you know anything about this. And potentially let me know what did I do wrong? Thanks in advance for your reply. It may help many others as well.

PS: Research so far advises to just hit the F11 key. That actually worked, but puts you into full screen mode so you can’t get to your task bar or close the window you’re in without going back out of full screen mode. NOT a fix. But something kind of useful. Also, try YouTube for answers. I see plenty to watch on how to fix screen resolution on Windows 10. I’m about to watch them now and will post the resolution here if I get one. dlg