Windows
7 curated resources, easiest first.
Windows 11 Settings only lets you toggle tray icons one by one. This answer opens the old Notification Area Icons control panel through a shell GUID, where the 'Always show all icons and notifications on the taskbar' checkbox still exists. Later Windows 11 updates may have changed or removed this.
The top answer avoids turning Credential Guard off. Instead it removes the saved Remote Desktop (TERMSRV) credentials and re-adds them as generic credentials with cmdkey, which Credential Guard accepts.
This error happens when WSL still has a distro registered but its virtual disk is gone, for example after reinstalling WSL. The fix is to unregister the stale distro and launch it again from the Microsoft Store. Warning: unregistering permanently deletes that distro's files.
Windows Firewall blocks incoming ping (ICMP echo) by default, which makes a PC look offline to network tools. The answer enables the built-in inbound rule for ICMP echo requests in Windows Defender Firewall's Advanced Settings, for the network profile you're using.
Windows 11 has no built-in shortcut for moving a window to the next virtual desktop. The accepted answer adds Win+Ctrl+Shift+Left/Right with an AutoHotkey script that uses a virtual-desktop helper library. It needs AutoHotkey and that library installed.
The answer removes the Gallery (and Home) entries by deleting their Explorer namespace keys from the registry, with reg delete commands for an elevated prompt. Registry edits can break things, so export the keys first, and expect feature updates to bring the entries back.
Changing RAID to AHCI in the BIOS usually stops Windows booting, because the AHCI storage driver isn't set to load early enough. The answer explains how to get Windows to load that driver before you flip the BIOS setting. Risky: back up first, and know how to switch the BIOS back if Windows won't start.