1: Delete all Adobe files and folders, leaving CoreSync_x64.dll and its parent folders left (you’ve likely done this already.)
2: Go to the MS Windows start button in the lower left corner, click, and in the run field, type “msconfig” Click on msconfig, and box will launch. In the startup tab, dis-able anything to do with Adobe, particularly Adobe Creative Cloud, and Adobe Updater. Acrotray is also part of Adobe startup sequence, disable as well.
3: Reboot PC . Go to CoreSync_x64.dll location and you will still NOT be able to delete the file, but WILL be able to rename it. Rename it “junk” or “crap” or whatever.
4: Reboot PC again, go to CoreSync_x64.dll location, you will now be able to delete file and parent folders.