I have installed SquidNT port of on my G: drive apart from the one running already. Both the Squids have different Service names under Services Applet of Windows. I have already created swap directories. (squid -z). Visible_hosname have been declared. Both are running on same machine. Both have been assigned different NIC. Both have been assigned different ports. Freshly installed Squid has been allowed access in the firewall rules. Now when I do " G:/squid/sbin/squid -f g:/xy/etc/squid.conf" I am getting following error in my cache.log : 2007/07/24 16:16:26| Starting Squid Cache version 2.6.STABLE13 for i686-pc-winnt... 2007/07/24 16:16:26| Running on Windows XP 2007/07/24 16:16:26| Process ID 2852 2007/07/24 16:16:26| With 2048 file descriptors available 2007/07/24 16:16:26| With 512 CRT stdio descriptors available 2007/07/24 16:16:26| Windows sockets initialized 2007/07/24 16:16:26| Using select for the IO loop 2007/07/24 16:16:26| Performing DNS Tests... 2007/07/24 16:16:26| Successful DNS name lookup tests... 2007/07/24 16:16:26| DNS Socket created at 0.0.0.0, port 4199, FD 4 2007/07/24 16:16:26| Adding nameserver xxx.xxx.xxx.xxx from Registry 2007/07/24 16:16:26| Adding nameserver xxx.xxx.xxx.xxx from Registry 2007/07/24 16:16:26| Adding nameserver 218.248.255.177 from Registry 2007/07/24 16:16:26| User-Agent logging is disabled. 2007/07/24 16:16:26| Referer logging is disabled. 2007/07/24 16:16:26| ipcCreate: CHILD: g:/squid/libexec/unlinkd.exe: (2) No such file or directory 2007/07/24 16:16:26| ipcCreate: PARENT: OK read test failed 2007/07/24 16:16:26| --> read returned 4 2007/07/24 16:16:26| --> got 'ERR%0a' FATAL: Failed to create unlinkd subprocess Squid Cache (Version 2.6.STABLE13): Terminated abnormally. My observation: 1. There is no squid.pid file present in G:/squid/var/logs 2. unlinkd.exe exists at g:/squid/libexec/unlinkd.exe 3. If I restart the system, Squid 2.6.STABLE13 starts successfully as seen in the services applet. But if I restart it, it again terminates with the error shown above. Please help why I am getting this error. Regards