Error Code 0x80070026 is common for all the Windows Operating systems when you try to install the updates. It usually appears when Windows 10 or Windows 7 update system is broken or there are network related glitches.
Reasons for this Error Code 0x80070026
Usual causes for this error code 0x80070026 are communication failure over the internet with Microsoft update servers.
Troubleshooting Steps for Error Code 0x80070026:
Disable the proxy internet connection and try again to install the update.
The procedure to Disable the Proxy Connection is as Follows:
Open Internet Explorer and click on Tools->Internet Options
Goto Connections and LAN Settings
Check to make sure the Proxy server is disabled.