Hi all, Have any one run into "installed digital signed driver on w2k8 64-bit, still need to select Disable Driver Signature Enforcement when boot" before?We have a driver already passed Unclassified Signature submission for WHQL. but we can not boot w2k8 64b smoothly, need select F8 and Disable Driver Signature Enforcement.I have ask WHQL team, but there is no solution for 2 weeks. Can someone advise?Thanks.Peggy.Wu

Hi, As we know, drivers are kernel-mode software. To protect system, Windows server 2008 64bit requires the drivers are digitally signed. The following guide provides us the following contents: The Kernel Mode Code Signing Process How to Disable Signature Enforcement during Development How to Use Test Signing Troubleshooting You can refer to this to troubleshoot digital signature related issue. Digital Signatures for Kernel Modules on Systems Running Windows Vista http://www.microsoft.com/whdc/winlogo/drvsign/kmsigning.mspx If the problem continues, for effective resolution, please contact CSS, so that a dedicated Support Professional can assist with your request. To obtain the phone numbers for specific technology request please take a look at the web site listed below: http://support.microsoft.com/default.aspx?scid=fh;EN-US;OfferProPhone#faq607