Troubleshooting

WSL terminal upgrading Ubuntu in place while preserving files

Linux

Upgrade WSL Ubuntu In-Place Without Losing Data

How to upgrade an existing Ubuntu-24.04 WSL instance to Ubuntu 26.04 in place while keeping its files, packages, configuration, and project data.

Tabby terminal showing Access is denied when launching pwsh

Tools

PowerShell Is Denied in Tabby

How I fixed pwsh.exe returning Access is denied inside the Tabby terminal after installing PowerShell Preview on Windows.

PowerShell commands probing a remote host to detect its operating system

Inventory

How to Detect If a Host Is Windows or Linux

Use ping, PowerShell, Windows built-in tools, WinRM, CIM, and SSH to determine whether a remote host is running Windows or Linux.

VS Code failing to download the WSL server with HTTP 404

WSL

Fix VS Code WSL Server 404

How to fix VS Code Remote WSL failing to download the VS Code Server with HTTP 404 after an update, and why WSL can still work from the command line.

Task Scheduler error 2147750687 indicating a task instance is already running

PowerShell

Fix Task Scheduler Error 2147750687

How to troubleshoot Windows Task Scheduler Event ID 101 with error value 2147750687, why it usually means another instance is already running, and how to fix overlapping or stuck scheduled tasks.

Active Directory

PowerShell for Office and AD Deployment

PowerShell notes for Office deployment, Office activation firewall rules, Get-ADUser queries, and domain rejoin troubleshooting.

WSL

Windows Troubleshooting: Network Shares, WSL Crashes, TPM

Troubleshooting notes for Windows network share errors, WSL crashes, VMware TPM checks, and disk space problems.

Test-NetConnection output showing whether a TCP port is open

Networking

Is That Port Open? Test-NetConnection vs Telnet vs PortQry

How to check whether a TCP port is open, blocked, or unreachable using PowerShell, Telnet, and PortQry.