Identifying unknown devices in Device Manager

Windows and Microsoft do a great job of providing drivers for hardware devices. A lot of drivers ship in the box with Windows and hundreds of thousands more are available online on the Windows Update site. Still you quite often end up with one or two unknown devices in Device Manager. When Windows Update or …

A list of System Center Virtual Machine Manager 2008 R2 warnings and errors, and their (possible) explanations/resolutions

Warning/Error number VMM Description VMM Recommended action Possible cause/Resolution 10696 The host network adapter does not support the specified virtual network adapter configuration. Select a host network adapter that supports this configuration. Remove the check mark for Enable virtual network optimizations on the virtual network adapter in the Hardware Configuration tab of the virtual machine.

Windows and Extension mechanisms for DNS (EDNS)

Introduction RFC 2671 defines the Extension mechanisms for DNS (EDNS), or EDNS0 as it is also known. EDNS is a specification for expanding the size of several parameters of the Domain Name System (DNS) protocol. More info about EDNS here. As of Windows Server 2008 R2, the Windows DNS service will use EDNS in its …

Error 0x8024D007 when running Windows Update

A server I was working on refused to let me update it through Windows/Microsoft Update. It would tell me that the computer needed an update before I could update it (!). First it would download some files from the Microsoft Update site, copy them and, finally, try to register them. This last step reached 100 …

Some notes on the Windows Server 2008 R2 Active Directory Recycle Bin Feature

The Enable-ADOptionalFeature cmdlet must be run on the Schema Master DC (if not you will get A referral was returned from the server) The only valid value for the Scope parameter is ForestOrConfigurationSet, Domain is not vaild (If you try you will get The specified method is not supported) The Forest Functional Level must be …

Configuring a Windows Domain Controller to synchronize its clock with an external time source

Kerberos authentication requires correct time on all clients participating in authentication. If the clocks on two machines trying to authenticate to each other are too far apart, Kerberos authentication will fail. Since Kerberos is used extensively in Windows a mechanism to ensure correct clocks throughout the forest was also implemented. This is the Windows Time …

Know thy SELF…

Windows has a special security principal know as SELF (also Principal Self and NT AUTHORITYSELF). Here’s the definition of SELF from KB243330: SID: S-1-5-10 Name: Principal Self Description: A placeholder in an inheritable ACE on an account object or group object in Active Directory. When the ACE is inherited, the system replaces this SID with …

The Windows Server 2008 DNS Server Global Query Block list

Event logged in the DNS Server log when a query is received for a name that exists in an authoritative zone, but is also on the global query block list: EventID : 7600 MachineName : lab-dc1.lab.net EntryType : Warning Message : The global query block list is a feature that prevents attacks on your network …

How to reset the Windows Recycle Bin

Sometimes the Recycle Bin of a partition/volume can become corrupted. When it does it prevents you from deleting files or takes up space that cannot be reclaimed by emptying the Recycle Bin, or both. To reset the Recycle Bin for a particular volume or partition, start up a command prompt with Administrative privileges and delete …