If it is Windows 10 it is one of the machines that come in S(afe) mode. By only getting apps from a trusted source (Windows Store) the machine is more stable and less likely to download infection.
Once you leave S(afe) mode by downloading anything from any other source you can never go back to S(afe) mode. It counts on you using Windows Defender for your anti virus and anti malware protection.
From HowToGeek:
"Microsoft is pitching security, speed, and stability here. Because Windows can only run apps from the Store, malware from the web won't be able to run. You can't install applications from the web, so they can't install startup tasks that slow down your boot process or junkware that hides in the background and spies on you.
S Mode also pushes the Bing search engine. While in S Mode, the Microsoft Edge web browser uses Bing as its default search engine. You can't change Edge's default search engine to Google or anything else without leaving S Mode first.
Windows 10 in S Mode can't use command-line shells like PowerShell, Command Prompt, or Bash, either. Various other developer tools are also off limits. You don't have direct access to the Windows Registry via the Registry Editor, either.
If all the applications you want to run are available in the Microsoft Store, S Mode is a more secure experience. That's why Microsoft initially pitched S Mode for schools. You can run Microsoft Edge, Microsoft Office, and anything else available in the Store, including apps like Apple iTunes and Spotify.
It's a bit like Apple's iOS operating system on an iPhone or iPad, which only allows you to install apps from the App Store. But S Mode limits you to the Windows apps available in the Microsoft Store."
But you can set Google as your home page for Microsoft Edge.