Windows update error with 80072efd

http://www.puryear-it.com/blog/2012/07/27/windows-server-update-fails-with-error-80072efd/

"One issue which causes Windows Updates to fail with error 80072EFD is if the Windows Server is looking at itself or another Server on the network for the updates.

To  check this:

1. Click Start > Run > type “regedit” without the quotes, and accept the UAC prompt to continue
2. Navigate to HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate
3. Look at the keys in that folder, if they look something like this:
   “WUServer”=http://srv_name:8530
   “WUStatusServer”=http://srv_name:8530

If this entries are listed under that folder, backup then delete the WindowsUpdate folder

1. Right-click on the folder and select “export” to save.
2. Delete the “WindowsUpdate” key from the registry at HKLM\Software\Policies\Microsoft\Windows.
3. Restart the Windows Update service. (located in Start > Run > type “services.msc” without quotes)"

How to reset Windows 10 account passwords

Windows 10 users who forgot the password of a user account cannot sign in to that account anymore. Certain options are provided to reset the password depending on the account type and other parameters such as whether it is a work account managed by an IT department or a home account.

Windows 10 supports two main account types: local accounts and Microsoft accounts. Local accounts exist only on the device, Microsoft accounts globally.

The account type determines whether it is possible to reset an account password. The solution is straightforward for Microsoft accounts as it is possible to reset the account password online.

UNTRUSTED CERT TITLE

I'm trying to reinstall macOS Sierra from the recovery partition, and I'm getting an error when it is checking for eligibility "UNTRUSTED CERT TITLE "

To fix this, simply update date time in your Mac by going to terminal:
ntpdate -u time.apple.com