Hi Becks1234
I am Dave, an Independent Advisor, I will help you with this . . .
If you need to install an application named TotalLock.exe you will need to switch out of Windows 10 S Mode
There is absolutely no problem switching out of S Mode, that mode is very limiting and restricts you to installing software from installing anything outside the Microsoft Store
Provided you are a sensible user, and only download software from reputable official sources, then you have nothing to worry about, and switching out of S Mode is free
Open the Settings App
Go to Update and Security - Activation
In the Switch to Windows 10 Home or Switch to Windows 10 Pro section, select Go to the Store. (If you also see an "Upgrade your edition of Windows" section, be careful not to click the "Go to the Store" link that appears there.)
On the Switch out of S mode (or similar) page that appears in the Microsoft Store, select the Get button.
After you see a confirmation message on the page, you'll be able to install apps from outside of the Microsoft Store.