I figured that I would try copying the older versions into System32 and SysWOW64. I copied the older files to the desktop, renamed them to old<dir>_user32.dll, and then moved them into System32 and SysWOW64. I know that these are protected files, so I rebooted into safe mode and cd’ed to the System32 folder. My plan was to delete the user32.dll file (yes, I first copied it someplace safe) and then rename the old<dir> file. However, when I tried to deleted user32.dll, I was told “Access denied”. Now what can I try?