Windows 10: System Restore Protection

In Windows 10, what is the average amount of disk space that should be set aside to hang onto 4 or 5 Restore Points?

:)

 

Is There a Way To Protect System Restore?

So I just got off trying to fix my dad's computer, for the 2nd time in a few months, because it has some kind of malware or trojan on it. The first thing I always go to to fix his system is system restore because he doesn't make many changes, if any at all, to windows, software, or basically anything system restore restores other than updating windows. But the last few times he's had various problems system restore, with either has it's restore points being deleted or restore won't even start up. So basically I really need help finding a way to either password protect system restore (preferably for free), get a 3rd restore program that won't get disabled by this malware crap, or any other alternative. I really appreciate any help you can give me because I've had this happen to a few computers that have come my way to fix and i wish there where a way to stop it.

Edit: Just found a program call Settings Lock (Download Settings Lock 2.7.0 Free trial - Password lock Windows settings and functions) that I tested and it did successfully stop me from turning off system restore or changing it--but it's $25 and i'm not sure if restore could be turned off another other than my gui interface with that program so i'm still hoping to find something better or at least hear some more info about it.

 

Cannot Create System Restore Point Because Cannot Turn On System Protection

In Control Panel/System/System Properties/System Protection, "Available Drives," all that is listed is "Searching..." No drives are located, so no System Restore point can be established.

How to fix?

I have an extensive active thread in another area of the community dealing with the failure of this PC to install the latest Windows 10 update. Prior to executing the next suggested step to fix that problem I need to create a System Restore point, so a
solution to this issue must be found before I can move forward on the major problem.

YES, I have ALREADY run the SFC Command as Administrator and the report was that everything was A-OK.

 

System Protection Recovery

Windows 10

1. Step 1: Right-click the lower-left corner and open System in the Quick Access Menu.
2. Step 2: Choose System protection on the left.
3. Step 3: Select a hard disk and tap Configure to move on.
4. Step 4: Choose Turn on system protection and hit OK.
5. Step 3: Select Disable system protection and hit OK.