(advanced):
First, find the KB number of the update. Then run:
wusa.exe /?
Since searching for “wusa.exe download” often leads to malware, you should verify the file on your own system. If you find wusa.exe anywhere C:\Windows\System32 or C:\Windows\SysWOW64 (for 32-bit compatibility on 64-bit Windows), it is likely malicious.
Before attempting any fix, identify which error you are seeing:
Once you have your .msu file, you can install it using the command line. This is particularly useful for IT admins who need to script installations. Common Command Examples: