Updating system settings
Windows Defender also has a section in the Update & security tab, though it hasn't been banished from the Control Panel like Windows Update.In this section, you can toggle different Windows Defender options, including real-time protection, cloud-based protection, and automatic sample submission.Imagine a situation when your system administrator or a 3rd party software or a malware disabled/restricted Windows Update settings page.In such situations, you won't be able to change Windows Update settings because all available options would be grayed out. Since Windows 10 is under development and testing, Microsoft has disabled customization of Windows Update settings because they want Windows to automatically download and install all preview updates.Go back to an earlier build will uninstall the most recent Windows 10 update to your PC.There's a time limit on this option: You can only go back to an earlier build within 10 days of updating.
I'm curious if this is a feature that I should avoid using until (a) we have a much more concrete idea of what we want our settings to be or (b) some SPRs are fixed on it in future releases.
You can now activate Windows 10 using a Windows 7, 8 or 8.1 product key, which means you can do a clean installation of Windows 10 and still receive the free upgrade promised to older Windows users.
To activate your copy of Windows 10, go to the Activation section and click Change product key, or click Go to Store if you'd like to purchase a different edition of Windows.
In this section, you can also turn off Windows 10's peer-to-peer update system, which lets your PC download updates from an online network of strangers' Windows 10 PCs.
For more information on how to do that, check out our guide.