system diagnostics

Windows has long shipped with a diagnostic toolkit that reaches far beyond the friendly switches in the Settings app, and five built-in commands deserve a permanent place in every troubleshooting routine: powercfg /batteryreport, sfc /scannow, driverquery, netsh wlan show wlanreport, and chkdsk...

Windows 11’s PC Insights Explains System Status, but It Is Not a Root-Cause Diagnostician Microsoft’s gradual U.S. rollout gives consenting Copilot users a conversational way to check CPU, memory, graphics, storage, battery, security, firmware, network, and connected-device information. The...

AppControl is a free Windows 10 and Windows 11 utility that monitors running apps, processes, hardware usage, temperatures, privacy-sensitive access, and recent system events, giving users a rolling three-day view of what slowed a PC instead of Task Manager’s mostly live snapshot. That...

PCMag UK’s hands-on look at AppControl, a free Windows 10 and Windows 11 utility from developer Jon Hundley, argues that the app gives power users a 72-hour view into process behavior, hardware usage, privacy-sensitive access, and system changes that Windows Task Manager still largely treats as...

Windows error codes often feel like random hexadecimal noise, but that frustration comes from the way Windows has layered several error systems over decades rather than from the codes themselves. Microsoft’s Error Lookup Tool, better known as ERR.exe, is the old but still useful utility that...

Knowing how much video RAM (VRAM) your Windows 11 PC has is a tiny piece of information that can save you hours of troubleshooting — and a bad purchase — when a game, video editor, or 3D app complains about memory or texture streaming. This deep-dive pulls together four reliable methods built...

If your Windows PC feels sluggish and Task Manager isn't giving you a clear culprit, there’s a built‑in tool that often finds the real reason in one minute: run perfmon /report and let Windows generate a System Diagnostics (Performance) Report. The utility quietly records 60 seconds of activity...

I’ve noticed my Windows system takes much longer to start after automatic updates. I’ve checked startup apps, disabled some, but it still feels sluggish. What steps do you take first when boot performance drops unexpectedly?