Hi, How is starting this Squid instance ? The following is a log fragment of a Squid service: 2009/11/29 09:13:44| Starting Squid Cache version 2.7.STABLE7-CVS for i686-pc-winnt... 2009/11/29 09:13:44| Running as Squid Windows System Service on Windows XP 2009/11/29 09:13:44| Service command line is: 2009/11/29 09:13:44| Process ID 1472 2009/11/29 09:13:44| With 2048 file descriptors available 2009/11/29 09:13:44| With 2048 CRT stdio descriptors available While your log seems to come from a command line interactive start: > 2009/12/01 16:23:52| Starting Squid Cache version 2.7.STABLE7 for > i686-pc-winnt... > 2009/12/01 16:23:52| Running on Windows Server 2008 > 2009/12/01 16:23:52| Process ID 1972 > 2009/12/01 16:23:52| With 2048 file descriptors available > 2009/12/01 16:23:52| With 512 CRT stdio descriptors available Do you have disabled UAC before installing Squid as noted in the release notes ? Regards Guido Serassio Acme Consulting S.r.l. Microsoft Gold Certified Partner Via Lucia Savarino, 1 10098 - Rivoli (TO) - ITALY Tel. : +39.011.9530135 Fax. : +39.011.9781115 Email: guido.serassio@xxxxxxxxxxxxxxxxx WWW: http://www.acmeconsulting.it