Windows Server 2019 (and 2016) Evaluation Product Key Activation Error

When activating Windows Server 2019 (Standard or Datacenter) installed with an Evaluation ISO, you receive an error

The product key you entered didn't work. Check the product key and try again, or enter a different one. (0x80070032)

The solution is to activate via console (cmd.exe). This method should also work for Windows Server 2016.

  1. First get the target edition
    Dism /online /Get-CurrentEdition
  2. Next provide the target edition in the below command using the output from the previous step. In this example the target edition was: ServerDatacenter
    DISM /online /Set-Edition:ServerDatacenter /ProductKey:XXXXX-XXXXX-XXXXX-XXXXX-XXXXX /AcceptEula
  3. If after a few minutes it is not progressing / freezes / hangs – right click in the window or press Control + D and restart the same command.  The step Removing package Microsoft-Windows… may take a while.
  4. The system will then begin configuring updates and reboot to complete
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Openmediavault 4.x and Windows 10 Shared Folder Errors

When trying to access an SMB share running on openmediavault you may get some of the following error messages, even though permissions have been set up correctly on the server and the correct password is being provided by the client:

Attempting to access the root of the server \\x.x.x.x\ you receive:
You do not have permission to access \\x.x.x.x\. Contact your network administrator to request access.

Attempting to access a specific share on the same server \\x.x.x.x\share you receive the following after providing the username and password:
The specified network password is not correct.

The problem was due to a bad Group Policy setting. Using gpedit.msc, navigate to the following:


Network security: LAN Manager authentication level

In this case it was set to:
Send LM & NTLM – use NTLMv2 session security if negotiated

To fix the problem it was changed:
Send NTLMv2 response only

This is the default setting for Windows Server 2008 R2 and later. The change is immediate and no reboot is required for it to take effect.

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VMware ESXi Hang on dma_mapper_iommu

ESXi (in this case version 6.7.0) can appear to hang / freeze during the boot up sequence at the following step:
dma_mapper_iommu loaded successfully
However the system is otherwise fully responsive (e.g., via vSphere). The root cause was that the video card used for displaying the local console had been enabled for passthrough.

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Errno 28 When Trying to Update VMware ESXi 6.7.0 Update 1 to Update 2

When trying to update/upgrade ESXi 6.7.0 Update 1 to Update 2 (via software profile update command) you may run into the following error:

[Errno 28] No space left on device
vibs = VMware_locker_tools-light_10.3.5.10430147-12986307
Please refer to the log file for more details.

The solution is to manually install VMware_locker_tools package by following these steps via SSH on the host:

  1. cd /tmp
  2. wget
  3. esxcli software vib install -f -v /tmp/VMware_locker_tools-light_10.3.5.10430147-12986307.vib
  4. Once you receive verification that the locker tools package has been installed successfully, try the profile update command again to patch ESXi.
    Note – in some cases the installation of this VIB may be skipped by the server and you receive the message: Host is not changed.  If so then simply try the profile update command again and you should not receive Errno 28 related to the locker tools VIB.

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Errno 28 When Trying to Update VMware ESXi

When trying to update/upgrade ESXi 6.7 (via software profile update command) you may run into the following error message:

[Errno 28] No space left on device
Please refer to the log file for more details.

The solution is to set the host swap to use a datastore. In vSphere Web Access:

  1. Navigate to Host->Manage->System->Swap. At this point, the Datastore setting should be set to No.
  2. Choose Edit Settings, select a valid Datastore in the drop down menu, then Save.
  3. Now you are ready to issue the profile update command again to patch ESXi

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Windows Server 2016 Stuck at 0% Windows Updates

New install of Windows Server 2016 (build 14393.447 from ISO SW_DVD9_Win_Svr_STD_Core_and_DataCtr_Core_2016_64Bit_English_-3_MLF_X21-30350 with no updates) had an issue where Windows Updates would hang / freeze indefinitely at 0% progress. 

When Windows Update ran it would briefly flash a list of updates that were available before disappearing. Then it would simply state “Updates are available” with a progress of 0%.  Also the folder C:\Windows\SoftwareDistribution was roughly 500MB in size. 

The solution was to re-enable the Windows Firewall which had been disabled immediately after the initial install and prior to running Windows Update for the first time. After enabling Windows Firewall, restart the Windows Update service (in services.msc) and then have Windows check for updates again.

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Windows Server 2016 Activation Error

Attempting to activate / convert an evaluation copy of Windows Server 2016 (specific build 14393.rs1_release.161220-1747) to the full version using a valid retail key, resulted in the following error:

This edition cannot be upgraded.

A solution is to perform the activation via console with the following command:

Dism /online /Set-Edition:<Edition> /AcceptEula /ProductKey:<ProductKey>

where <Edition> is either ServerDatacenter or ServerStandard and <ProductKey> is your product key with dashes.

The Deployment Image Servicing and Management tool may indicate that it has finished installing product key, but then hang at 10.0% on the next step:

Removing package Microsoft-Windows-Server.....

If after 30 minutes it has not progressed – cancel the entire process, then repeat the same steps and it should go through the second time.

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Windows Server 2016 Remote Desktop Connection Fails

Brand new install of Windows 2016 Server Evaluation without any updates installed, specific build 14393.rs1_release.161220-1747 (also 14393.447)  Attempting to remote desktop to the server from a Windows 10 client resulted in an error:

An authentication error has occurred.
The function requested is not supported
Remote computer:
This could be due to CredSSP encryption oracle remediation. For more information, see

Note: For Windows 7 clients, the last line above in red color will be omitted from the error message.

This happened for both Datacenter and Standard installs of the same build. The fix is to simply install all available updates from Windows Update, rebooting in between as necessary. After all updates have been installed, try the remote connection again.

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Installing Logitech QuickCam 4000 in Windows 7

QuickCam 4000 shows up as “Unknown device” in Windows 7 Device Manager

Download the 64-bit driver from Logitech

Unpack this .exe file to a folder using 7zip, WinRAR, etc.

In Device Manager right click the device, update driver, Browse my computer and point it to this folder containing the unpacked files.

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Disable “Debug the program” After Application Crash

Group Policy options will let you disable the button for error reporting to Microsoft (Check online for a solution and close the program) but there is no option in Group Policy to disable the debugging button. To disable the “Debug the program” button that is shown in the Windows Problem Reporting window after a program crashes, there are two registry entries that must be modified. One controls it for 64-bit program crashes and the other for 32-bit program crashes:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AeDebug]

[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\AeDebug]

Under each of these keys, you will see a string titled Debugger.  Rename it (e.g., Debugger.bak) and the debug button will no longer show up.

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