What https://superuser.com/a/53274/269574 mean? I uneducated in computer. Look below. No idea what mean all these letter number combinations. No idea delete what!
After you have installed all the pending updates, it is safe to delete all the files and folder under C:\WINDOWS\SoftwareDistribution\Download\
As @Zab said, stop the Update Service while you clean up the folder.
net stop wuauservinto an elevated command prompt
- Manually clean up
net start wuauservinto an elevated command prompt As soon as the service starts again, some folders will be re-created. This is ok.