HTTP status 401: The requested resource requires user authentication.
What is the state of the BITS service ? Open the services console and,
if the service is not started but is set to Manual for Startup type, see
if you can start it.
If it it started, see if you can stop and restart it.
> There have not been any updates run on this server in over a year now and it is a Domain Controller.
Why did you wait so long to seek assistance with this issue ?
What is the installed security software/antivirus and which firewall
and/or proxy server is being used ?
The only MSKB that cites 0x80190191 is for XP and it refers to BITS:
MowGreen [MVP 2003-2008]
> I have a windows server running windows server2003 and it will not update. I
> get the Error number: 0x80190191 each time I try. There have not been any
> updates run on this server in over a year now and it is a Domain Controller.
> Any suggestions?