A:AnswerNo, this laptop comes in Windows 10 in S Mode. It is very easy to switch out of Windows 10 in S Mode. Here is how: https://support.microsoft.com/en-us/help/4456067/windows-10-switch-out-of-s-mode
A:AnswerYes, you can. Here is more information: https://support.microsoft.com/en-us/help/12439/microsoft-account-set-content-restrictions-on-windows-10-and-xbox-one
A:AnswerIt looks like it's generally available in stores, but you'd need to check on the Best Buy website to see if it's available at a particular store.
A:AnswerYes, it is powerful enough to monitor your cameras and play back the footage. You my need an external drive or flash drive for extended storage.