[BSOD] UNEXPECTED_KERNEL_MODE_TRAP - tdx.sys stopcode 0x7f daily on VMware fix

[BSOD] UNEXPECTED_KERNEL_MODE_TRAP - tdx.sys stopcode 0x7f daily on VMware fix

Today I was fortunate again to do a debug, at an environment we had several BSOD/bugcheck errors on a daily basis, sometimes twice a day. This time it was probably caused by: tdx.sys. The stopcode was 0x7f. This time the error occured on a Windows Server 2008 R2 virtual machine hosted by a VMware ESXi 5.5 server, with VMware tools ‘complete’ installed. The problem seems a bit similar to this post and the steps towards a solution are also the same, it’s just about to remove the VMCI driver for VMware vShield Endpoint…

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Disable the SSLv3 Protocol on Microsoft Windows Servers

As more and more webservers on the internet are disabling SSLv3, because of the Poodlebleed Bug (OpenSSL Announcement, PDF), It is maybe time to disable it aswell in your on-premise environment. In this article I’ll show how to disable this protocol for Microsoft Windows Servers with a simple registry key. Although SSL 3.0 is almost 15 years old, many servers and web browsers still use it today. When web browsers fail at connecting on a newer SSL version (i.e. TLS 1.0, 1.1, or 1.2), they may fall back to a SSL 3.0…

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Windows Server guest gets BSOD/Bugcheck on VMware ESXi 5.5 and 5.5u1 [update]

At a networksite we migrated a few weeks ago from VMware ESXi 5.1 to version 5.5, there was a server that crashed daily with a BSOD/bugcheck error. We couldn’t find a cause for this directly, but it seems there is a memory leak caused by VmWare tools VMCI driver VMware vShield Endpoint TDI manager in VMware ESXi 5.5 and this problem is still here with an update to version 5.5 update 1. The problem lies in the VMCI driver, that comes when you install VMware tools with the option ‘complete’ instead…

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