Tag: downgrade

When .NET wants to be 4.5.2

Someone in the application group said that they wanted .NET downgraded from 4.5.2 to 4.51. I did as I was asked and then in the next few days, I got another call telling me that 4.5.2 was back.  The application they are running is not supported in 4.5.2.

This system isn’t managed by WSUS so Windows update did what it was designed to do.

Here is a link to block the update of .NET to 4.5.2:

How to temporarily block the installation of the .NET Framework 4.5.2

Be sure to backup the registry before you begin.

Browse to:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\

Add a new Key called WU, then add a new DWORD value named BlockNetFramework452
Modify it and set it to 1.
Exit the registry.

 

 

BSOD on a Windows VM bugcheck code 24

A VM that is running Windows 2008 R2 has experienced a BSOD. The application owner notified me and sent me some useful information.

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.400.8
Locale ID: 1033
Additional information about the problem:
BCCode: 24
BCP1: 00000000001904FB
BCP2: FFFFF88006C34E28
BCP3: FFFFF88006C34680
BCP4: FFFFF880014E81B2
OS Version: 6_1_7601
Service Pack: 1_0
Product: 400_3
Files that help describe the problem:
C:\Windows\Minidump50415-20202-01.dmp
C:\Users\servername\AppData\Local\Temp\WER-42663418-0.sysdata.xml
Read our privacy statement online:
http://go.microsoft.com/fwlink/?linkid=104288&clcid=0x0409
If the online privacy statement is not available, please read our privacy statement offline:
C:\Windows\system32\en-US\erofflps.txt

 Good info here, but with all BSODs, you should look at the dump file for more definitive information.

I grabbed the dump file, and downloaded Windows SDK. During the install, I unchecked all the boxes except the Debugging Tools for Windows and installed.

Features to Install

Launch WinDGB (x64) as administrator. The first step is to configure the symbol file path. It can be any folder on your server, just create an empty one and go to File > Symbol File Path.

In the symbol search path, I entered the following and clicked OK.

SRV*c:\tmp\symbols*http://msdl.microsoft.com/download/symbols

Symbol Search Path

Save the workspace. File > Save Workspace

Opened the dump file. File > Open Crash Dump.

Open Dump File

Before you proceed, read the info under the bugcheck analysis. It tells you what probably caused the error.

NTFS.sys

Click the link in the Bugcheck Analysis section, !analyze -y to get more information.

Read through the info. Note the following:

  • Process Name
  • Bugcheck_str
  • Image Name
  • Area right above the debugging details

At the very top you’ll see a message and some arguments.

Analyze

At the kd> prompt at the bottom of the debugger, enter

.bugcheck

Bugcheck command

In the analysis you see the Arguments. Do a .cxr on the 3rd argument as it suggests.

arguments

.cxr fffff88004523680

CXR command

CXR output

Next,

Run the kb command for a more informative stack trace.

Run KB command

There are now a few pieces of information to hone in on.

  1. The bug check code
  2. The stack track text

Look up the bugcheck code here on the msdn bug check code reference page.

https://msdn.microsoft.com/en-us/library/windows/hardware/hh994433%28v=vs.85%29.aspx

Google the stack trace text and this vmware KB article # 2115997 comes up.

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2115997

This appears to be a known issue with a few versions of vmware tools:

I looked in the vmware.log file for the entries mentioned and they matched.

vmware-logs

The image name on the dump file referenced vds.exe and this VM is running tools version 9.4.11. This issue only appeared since the tools upgrade when we upgraded to 5.5 Patch 4

To confirm what version of tools you’re running, go to the VM and in the notifications bar, right click on the icon and select About  VMware Tools

VMware Tools version

Time to downgrade tools.

Find the tools ISO that will have a version that is not listed in the KB, but one that is compatible with your version of vsphere.

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1036810

https://packages.vmware.com/tools/versions

Search for your current version and find the one closest to it that is not affected with this issue.

Version of tools to downgrade to

You’ll have to uninstall the current version of tools before installing older version. It will require a reboot.

The hardware version will not be an issue with this versions of tools, but confirm that for your specific environment.

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