http://blogs.technet.com/b/networking/archive/2009/03/04/network-connectivity-issues-post-deployment-of-ms09-001-try-updating-your-anti-virus-signature.aspxOne of our customers reported an issue after applying the update per KB958687 (MS09-001), which installs a new version of SRV.SYS. The customer was experiencing the following symptoms: Request Timed Out error when trying ping the problem machine fromen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.technet.com/b/networking/archive/2009/03/04/network-connectivity-issues-post-deployment-of-ms09-001-try-updating-your-anti-virus-signature.aspx#3209961Fri, 06 Mar 2009 13:01:51 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3209961360gsp<p>Very nice read. Thank you for the information.</p><div style="clear:both;"></div><img src="http://blogs.technet.com/aggbug.aspx?PostID=3209961" width="1" height="1">