Fix Windows errors without the guesswork.

Match the symptom to the cause: startup lag points to startup apps, post-update lag points to drivers, and constant disk thrash points to storage or paging.

Windows 11 CPU use above 80% at idle usually points to a runaway process, driver issue, Windows Update, Defender scan, or malware. Start with Task Manager.

Windows 11 has no built-in Guest account, so use a standard local user, kiosk mode, or a child Microsoft account instead.

If a Windows computer is stuck on the welcome screen, wait after updates before forcing a restart. Then follow data-safe steps for a true freeze.

Code 343 usually means you need to fix a Code 43 device error. Start with the driver, then check graphics, USB, and Wi‑Fi devices.

Windows 11 “unidentified network, no internet” usually means the break is above the link layer. Check link, then IP lease, DNS, and VPN or security policy.

Match the symptom to the repair order: power, firmware, Safe Mode, Startup Repair, or update rollback.

Use Network Troubleshooter first for light fixes; choose Windows 10 network reset after repeated failures.

Start with Safe Mode. If restarts stop there, suspect a driver or startup app; if not, check updates, heat, hardware, and boot files.