So, following some troubleshooting, I run sfc /scannow in the powershell and I get the msg:
Windows Resource Protection found corrupt files but was unable to fix some of them. Details are included in the CBS.Log windir\Logs\CBS\CBS.log. For example C:\Windows\Logs\CBS\CBS.log. Note that logging is currently not supported in offline servicing scenarios.
So I try to visit CBS but I don't have access and apparently now I have to dig into the security options and try to gain access to the folder... (and all this to see some log that apparently won't tell me anything much..)
I have a dream.. That some day operating systems won't suck this badly.