Windows 7 not booting? Learn how to fix startup issues using Safe Mode, Startup Repair, or command prompt tools.

Turn off your system. Remove the power cord and disconnect all the peripherals. Disconnect the charger if it is a laptop. Press and hold the power button for up to 30 seconds. Turn on your system.

First, open the System Information window by typing msinfo32 in the Start menu or by navigating to your System Information ...