Hi Yang,
The RAM wont actually fix the Windows Update issues, but it will hopefully prevent this from reoccurring.
Now onto the WU issues.
Please download the Freeware RegBak from here:
Acelogix Software - Download products
Navigate to
C:\Windows\RegBak\{Date}\ and copy the
COMPONENTS file to your Desktop. If the
COMPONENTS file does not exist, please fetch it instead from
C:\Windows\System32\config\COMPONENTS.
Now
right click on it >
Send to >
Compressed (zipped) folder.
Then please upload it to your favourite file sharing website (it will be too big to upload here). If you have a Microsoft Account, OneDrive could be a good choice:
https://onedrive.live.com/, but any other will do just fine. Make sure to set the file as publicly accessible