change "Legacy game installers"

I am on my computer, Windows 10, and signed in as admin. I am the only user. I am trying to change game and cache folders in Origin which is on drive F:. When I try to change "Legacy game installers", I get the error: "Origin is not able to save games here because the folder is read-only. Please choose another folder." When I use Windows Explorer to go to those folders, I am unable to remove the read only from these folders, as it shows clear, but closing and reopening properties it is back.

I read the solution on EA Answers HQ and it said to open "Windows Defender Security Center", select "Virus & threat protection", and then choose "Virus & threat protection settings". "Under Controlled folder access, turn it on or off."

I am unable to open "Under Controlled folder access". I get an error message: "Page not available. Your IT administrator has limited access to some areas of this app, and the item you tried to access is not available. Contact IT helpdesk for more information.". When I open "Windows Defender Security Center", I see the message "Avast Antivirus Avast Antivirus is turned on". So, I am assuming this must be the IT administrator they are referring to.

If Avast is controlling "Under Controlled folder access", how do I access it? I tried disabling Avast, but nothing changed. I have also asked about it on the Avast Forum. No response yet.

This started when Origin updated yesterday. The game and cache folders had already been set. Origin is installed on drive F:, as well as all my games. When I tried changing the game folder, I selected the F: drive and Origin added F:\Program Files (x86)\Origin Games. What I wanted was F:\Origin Games, so I changed it. Origin installed the "Legacy game installers" on C:\ProgramData\Origin\DownloadCache.  Why does it keep trying to add game files on drive C: (C:\Program Files (x86)\Origin Games)?

Is there a way to roll Origin back or install an earlier version without losing my games?