> I installed WinHTTrack on the PC at my working place. How 
> to find the settings for the proxy server to put in 
> WinHTTrack. This settings read like this 
> <http://www.proxyconfig.intra.aaaa.xy/proxy.pac>

Can you download the file and view the contents?  Pac files 
are often rule-based and complex, but should have the proxy 
details.

Or ask your admin.