[SOLVED]AADSTS220501 InvalidCrlDownload - Azure Entra Certificate Based Authentication (CBA) issue If you like to muck around with Azure & Entra Certificate Based Authentication (CBA), you'll be familiar with the importance of a Certificate Revocation List (CRL). Someday, while trying to login to admin.microsoft.com with a certificate, I experienced this AADSTS220501 Error so I started troubleshooting at it. What's interesting is that the CRL was online,… Read More
[SOLVED]Unexplained random Dell XPS 15 L502x laptop freeze (no BSOD, no cursor, blank solid colour background) In the past few weeks, my Dell XPS 15 L502x started experiencing unexplained freezes, with a blank screen (ie. black, white or other solid colour background), no mouse cursor and no BSODs. It was a little bit hard to troubleshoot my problem. tl;dr FIX: MSI Afterburner with the MINIMUM POSSIBLE GPU and Memory… Read More
[SOLVED] Window Update Error 80072F8F. For a few years, I’ve been haunted by the dreaded Windows Update issue 80072F8F. I experienced this error whenever one of my Windows 8.1 Pro and Windows Server 2012 R2 computers searched for updates on Windows Update (my computers were originally joined to a Windows 2012 Domain then raised to 2012 R2). And no, raising… Read More