I have downloaded latest version of squid and tried to compile squid on windows according to http://www.piececode.com/other/compile-squid-2-7-on-windows/ , I changed c:\squid to c:\squid2, because had a precompiled version in there. When I run c:\squid2\squid.exe , squid.exe -v , squid.exe -i , squid.exe -X , as I tested these parameters, it will be exited quickly without printing anything at all. Why? I found where the system doesn't return 0 and quits, it's in function WIN32_Subsystem_Init . Thanks!