I am aware Edge wants to stay open in background after closing. I kill the tree with process explorer and tweaked settings to stop that as mentioned above. Meanwhile on hardware win10, lately whenever I close Edge I get a warning popup from CL BLOCK or ALLOW rundll32.exe (valid MS file in system32) with command line
"c:\windows\system32\rundll32.exe" c:\windows\system32\inetcpl.cpl, clearmytracksbyprocess flags:75498491 winx:0 winy:0 ieframe:0
Initially I blocked it, but more recently I have allowed, but either way, next time I close Edge it happens again. I am not aware that I changed anything with Edge to trigger this. curious but just an annoyance. I do not see this popup on win10_VM running CL.
EDIT: I just ran modify / repair of Edge which reinstalled it, and opened Edge, and closed it and again got the same warning popup from CL