Mainly clean install Windows 7、This happens with a very high probability if there are too many updates.。
Can't proceed from "Checking for updates"
—————————————————————
【Solution decision】
Manually install windows update KB3138612。
Download the package that suits your environment from the Microsoft Download Center.、install。
https://support.microsoft.com/ja-jp/kb/3138612
Download the package that suits your environment from the Microsoft Download Center.、install。
*It seems that it does not work in IE.。
In that case other browsers、You can download it using Google Chrome etc.。
Once downloaded, restart your PC。
*It will not work if unnecessary things such as Windows Update are running.。
Install the downloaded package。
restart。
The rest is as usual、Windows update should proceed。