Trouble scheduling a full scan

I have Norton Internet Security installed. Long ago I configured it to perform a full scan of my PC every Friday night, starting around midnight. Then I noticed the Norton Security process keeps the PC extremely busy until around 11am on Saturday.

So I've been trying to re-schedule the full scan to start several hours earlier (using Settings --> Task Scheduling) - but it's still behaving the same and keeping the PC busy until around 11am on Saturday, as if I change nothing.

What am I doing wrong?

Thanks

It's now Saturday morning here and IT WORKED!

Nitsan:

Just wondering why 2 different dialogs show different hours. 

Sorry, I do not schedule any Norton tasks/scans.
As far as I know.  
Settings --> Task Scheduling is only for the listed tasks.  
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Sorry, I don't know why Settings -> Task Scheduling mentions "and in it's Full Scan".  Unless the checked "Tasks" are also run during a Full Scan.  IDK.  

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Please post back progress.  Thanks

Ok thanks - apparently I do have the new interface. Just wondering why 2 different dialogs show different hours. 
I followed the above suggestion and waiting for the coming weekend to test.

Nitsan:

1) What is "Norton 360 Classic view"?
2) When I try: Tray -> Norton Internet Security -> Security tile -> Scans --- I don't see any "Edit Scan to your preference"...

Hopefully, you're running Norton 360 - branded Norton Internet Security.  
Switch between the My Norton window and Classic view
https://support.norton.com/sp/en/us/home/current/solutions/v135516915

1) Classic view:  Security tile -> Scans -> Custom Scan -> Go


 

2) Do you see Edit Scan pencil? -> click pencil 

Edit Scan -- with your preferences -- Next -> Save

What is "Norton 360 Classic view"?
When I try: Tray -> Norton Internet Security -> Security tile -> Scans --- I don't see any "Edit Scan to your preference"...

Try using Norton 360 Classic view -> Security tile -> Scans -> Custom Scan -> check Full Scan box -> Edit Scan to your preference -> Save

https://support.norton.com/sp/en/us/norton-360-deluxe/current/solutions/v1910850