Edit: I can get to the control panel, and I can see Windows Update, but I get this error message when I try to click on it:
The application has failed to start because its side-by-side configuration is incorrect. Please see the application event log or use the command-line sxstrace.exe tool for more detail.
I Googled the message and there are many reasons for that error, and many solutions - but none specific to my issue (that I can find).
Fast solution: In modern society, it is quite easy for people to come across Can't open Settings (Windows Update) problems. Once you don't fix this problem in time, your computer may cause more trouble for you. The fact is fixing Can't open Settings (Windows Update) error is not that complicated.
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Related Reference: http://windows.microsoft.com/en-us/windows7/products/features/system-restore
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