I found this Microsoft Help and Support Notice Thanks to Guru Hoov..Windows Vista cannot obtain an IP address from certain routers or from certain non-Microsoft DHCP servers<H2 class=subTitle id=tocHeadRef>SYMPTOMS</H2><DIV class=sbody>Consider the following scenario: <TABLE class="list ul"><TBODY><TR><TD class=bullet> </TD><TD class=text>You connect a Windows Vista-based computer to a network.</TD></TR><TR><TD class=bullet> </TD><TD class=text>A router or other device that is configured as a Dynamic Host Configuration Protocol (DHCP) server is configured on the network.</TD></TR><TR><TD class=bullet> </TD><TD class=text>The router or the other device does not support the DHCP BROADCAST flag.</TD></TR></TBODY></TABLE>In this scenario, Windows Vista cannot obtain an IP address. <P class=topOfPage>Back to the top<H2 class=subTitle id=tocHeadRef>CAUSE</H2><DIV class=sbody>This issue occurs because of a difference in design between Windows Vista and Microsoft Windows XP Service Pack 2 (SP2). Specifically, in Windows XP SP2, the BROADCAST flag in DHCP discovery packets is set to 0 (disabled). In Windows Vista, the BROADCAST flag in DHCP discovery packets is not disabled. Therefore, some routers and some non-Microsoft DHCP servers cannot process the DHCP discovery packets.<DIV class=sbody><DIV class=sbody>http://support.microsoft.com/kb/928233<DIV class=sbody><DIV class=sbody>

Operating System:Windows Vista Ultimate
Software Version:7.1 (Vista)
Product Name:ZoneAlarm Internet Security Suite

Message Edited by GeorgeV on 05-26-2008 08:40 AM