How to

Open certmgr.msc, the Certificate Manager in Windows 11 and 10, to view, import and export certificates, plus certlm.msc, MMC, PowerShell and certutil commands.

Thunderbolt software for Windows 11: when you need Intel Thunderbolt Control Center, where USB4 settings live, and how to fix docks, displays and cables.

Call forwarding on Verizon, AT&T, T-Mobile and US Cellular: star codes to turn it on and off, the iPhone switch, conditional forwarding and busy-tone fixes.

1080p resolution is 1920 x 1080 pixels, shown progressively, also sold as Full HD or FHD. How it compares with 720p, 1440p and 4K, and when it is enough.

How to get Windows 10 free legally: reinstall with your digital license, get free ESU security updates to 2027, or upgrade to Windows 11 at no cost.

Install pending Windows updates on Windows 11/10 from Settings, then restart. Fixes for updates stuck at Pending install, 0%, 100% and common error codes.

Connect a scanner in Windows 11: plug it in or join it to Wi-Fi, then select Add device in Printers & scanners. Drivers, Windows Scan and fixes.

Open Print Management in Windows 11 or 10 with printmanagement.msc, install it if missing, add and deploy printers, and manage queues with PowerShell.

Windows 10 Disk Management: initialize a new disk, create and format partitions, shrink or extend C:, change drive letters, plus DiskPart, PowerShell and fixes.

Calculate an inverse matrix in Excel with MINVERSE, check it with MMULT, and reuse it with LAMBDA. Includes a worked 3×3 example and fixes for #NUM! and #VALUE!.

Change the taskbar color in Windows 11 from Settings: switch to Dark mode, pick any accent color, and turn on Show accent color on Start and taskbar. Fixes included.

Get Microsoft PowerPoint for free with PowerPoint for the web, the mobile apps, a one-month Microsoft 365 trial or a school email. Steps, limits and fixes.