Author Archives: krylon

Ubuntu Guest VM Random Freezing Lockups on ESXi 6.5

Ubuntu Server 17.10 was randomly freezing / locking up after periods of time, even if left idle.  The solution for this VM was to change the type of network adapter assigned to the guest. By default, ESXi 6.5 will assign … Continue reading

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Steps to Downgrade MongoDB on Ubuntu (for UniFi Controller)

This is an example for downgrading from MongoDB version 3.6 to version 3.4 in Ubuntu 18.04 LTS, but it can be adapted for any combination of versions. Remove old versions. Since this was done for a compatibility issue with UniFI … Continue reading

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Restore Default Certificate Deployment Level for RemoteApp (Windows Server 2012 R2)

This guide details how to change the certificate deployment level of a Windows Server 2012 R2 RD system from “Trusted” back to the default configuration of “Not Configured.”    The main problem is that the Windows GUI does not allow … Continue reading

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Inject Drivers into a Windows 7 PE Image

One scenario – booting a system using a USB Windows PE flash drive, the same flash drive then could not be read within Windows PE. This was because the PE image had no USB 3.0 drivers. The solution was to … Continue reading

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Create a Windows 7 PE Bootable USB Flash Drive (32 bit and 64 bit)

Download Windows 7 AIK ISO file https://www.microsoft.com/en-us/download/details.aspx?id=5753 Burn the ISO or extract it to a folder (e.g., using 7zip) Run StartCD.exe Choose the “Windows AIK Setup” option When complete, navigate to Start->all programs -> Microsoft Windows AIK -> Deployment Tools … Continue reading

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Crossflash Dell PERC H200 or H310 to LSI 9211-8i IT Mode Using Legacy (DOS) and UEFI Method (HBA Firmware + BIOS)

Update 09-Feb-2025: added H200 method. The Support Files zip file was also updated for better EFI compatibility and to include the DOS version of sas2flsh.exe Update 30-Oct-2019: clarified that BIOS flashing is optional, added an error that can be encountered … Continue reading

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Unable to log in to Windows because “The Group Policy Client service failed the logon. Access is denied.”

When trying to log in to Windows (in this case Windows 7 using a domain account) you may receive the following error This particular situation occurred after a reboot following the installation of the latest Windows updates. There are several … Continue reading

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How to Factory Wipe Settings and Data for Asus MeMo Pad

I could not find a reliable procedure for performing a factory reset / restore on these devices, so I have put one together. The official procedure from Asus did not work for me. This has been tested specifically with the … Continue reading

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Start Menu Doesn’t Work After Windows 10 Fall Creators Update (Build 1709)

After installing this update you may find that you are no longer ble to launch your Start Menu. When clicking on the Windows logo button, it is animated but the Start Menu doesn’t appear. Try the following: Press Control-Alt-Delete Launch … Continue reading

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Upgrade PHP on CentOS (CentOS version 6 or 7)

Update 26-Feb-2020: See the updated version of this guide here: Upgrade to PHP 7 on CentOS 7 (or CentOS 6) You may find that you need to upgrade PHP on your CentOS install in order to meet dependencies for an … Continue reading

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