Software, downloads, etc . . .
Windows updates and Security: https://support.microsoft.com/en-gb/search?query=windows%20defender, older versions: Microsoft security essentials ending January 14, 2020. https://www.intowindows.com/can-i-install-microsoft-security-essentials-in-windows-10
Windows defender Antivirus for windows 10: https://www.microsoft.com/en-gb/windows/comprehensive-security.
Kaspersky internet security: https://www.barclays.co.uk/help/security-fraud/software - https://www.bbc.co.uk/news/uk-42209489, https://www.kaspersky.co.uk/downloads, https://support.kaspersky.co.uk, https://www.kaspersky.co.uk.
Google account recovery, without a recovery email, or password: https://webapps.stackexchange.com/questions/52706/how-do-i-recover-my-google-account-or-gmail-password-or-username, https://accounts.google.com/signin/v2/recoveryidentifier?flowName=GlifWebSignIn&flowEntry=ServiceLogin
https://windowsreport.com/computer-motherboard-serial-number-windows-10