Fix a Windows 11 PC that won't boot
Work the recovery environment in order: Startup Repair, Safe Mode, System Restore and update removal, with the BitLocker key snag covered before it stops you.
Windows PC troubleshooting & repair
A broken PC, a bench, a method.
Every guide here takes one fault — a Windows 11 machine that will not start, a desktop that restarts mid-game — and works it in order: the free checks first, the likely causes in sequence, and the point where the evidence says a part is dying and no setting will save it.
Start with the two faults that strand people most
Diagnose a PC that randomly restarts or shuts down
Read the event log first, then split the suspects: heat, memory, power supply, and only then drivers and updates.
How each guide is laid out
Each guide opens with what you need on the bench before you touch anything, then walks the diagnosis or repair as numbered steps, cheapest and least invasive first. It closes with the end state that tells you the job is done, and the snags that most often stall the same repair halfway.
Browse the full list of guides.