Author Archives: krylon

Unable to Delete User Profiles Windows 7

I had a situation where the Delete button was grayed out  / disabled when attempting to delete a user account on a Windows 7 machine. This occurred when logged in with an account with full administrator privileges.  The solution was … Continue reading

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Solid Activity Light on Backplane for SAS Drive

I recently acquired some SAS hard drives but when installed in a Norco SATA/SAS backplane the activity light was always on when idle (for this backplane, the light was a constant green). This behavior was opposite of the SATA drives … Continue reading

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Acquiring Real IP of Client with NGINX, Apache and WordPress (also with Cloudflare)

For this particular example I was trying to block brute force authentication to WordPress using the Limit Login Attempts Reloaded plugin.  This setup had an NGINX proxy in front of Apache that was serving a WordPress instance as a Virtual … Continue reading

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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 … Continue reading

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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: … Continue reading

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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 … Continue reading

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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: [InstallationError] [Errno 28] No space left on device vibs = VMware_locker_tools-light_10.3.5.10430147-12986307 Please refer to the log file for … Continue reading

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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: [OSError] [Errno 28] No space left on device Please refer to the log file for more details. The solution is to … Continue reading

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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 … Continue reading

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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 … Continue reading

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