What should I do if Windows does not start

Correct mistakes, we will be in Windows 10. But about the same will have to do in Windows XP, 7 and 8. For Windows 7 and later releases, the developers have improved recovery system after problems with the launch. In older versions of the system serious mistakes often have to solve reinstalling.

Disconnect peripherals

Try to remember what changes you have made recently to the system: set any new drivers, Device or something switched. Perhaps the problem in one of the hardware components. Try disabling:

1. USB-drives.
2. Card readers.
3. Printers.
4. Scanners.
5. Camera.
6. All other external devices.

If this does not work, unplug the keyboard and mouse: it is necessary to eliminate all possible sources of error.

Also, the cause may be the internal components, such as memory. In the desktop PC, you can test the functionality of RAM, connecting strips alternately.

Check power

If the computer will not turn on at all, pay attention to the power cord and plug. Do not forget about the power switch on the rear panel desktop.

If at this level everything is working, but the computer still does not turn on, then most likely, the problem power supply, you are unlikely to be able to fix by yourself: have to be replaced or repaired at specialist.

The variant when the computer is turned on, but only for a short time. This is the same problem with the power supply.

Adjust the drive to boot your system

At startup error may occur: An operating system was not found. Try disconnecting any drives that do not contain an operating system. Press Ctrl + Alt + Del to restart or Boot failure. Reboot and Select Proper Boot device or Insert Boot Media in selected Boot device.

The UEFI BIOS settings, or may be installed from an external loading device, or other logical partition rather than a system disk. Restore the default settings, you can:

1. To restart a computer.
2. Immediately after the restart the system, press the key, for example F2. This may be another key: usually during the boot of her system can be found at the bottom of the screen with the logo of the manufacturer of laptop or motherboard.
3. In the settings you set in the first place to load the desired disc.
4. Select the option "Save and Exit» (Save and Exit), to save the changes.

If the above does not work, it is necessary to restore the boot loader. This will require a bootable flash drive or disk recovery on a suitable discharge system. How to make a bootable USB flash drive or disk, read article Layfhakera about installing Windows.

Start the system from a USB drive or disc, select the desired option from the boot menu. In Windows, the installation menu that opens, select "System Restore."

In the recovery menu, select "Troubleshooting» → «Advanced settings» → «Startup Repair." After that, the system will automatically attempt to fix the loader. In most cases, it solves the problem.

The same can be done manually via the command line, but it is better to choose the automatic option, so as not to aggravate the situation.

If this method did not, perhaps, the problem is in the hardware: the hard disk is damaged.

Check the drive for errors and damage

In the recovery menu, select "Troubleshooting» → «Advanced settings» → «Command Prompt."

At the command prompt, enter one by one team: diskpart → list volume (Be sure to note the name of the disk with Windows) → exit.

To check the disk for errors and damage, type chkdsk X: / r (Where X - is the name of the disc with Windows). Checking usually lasts long enough, it will have to wait.

Start Windows in Safe Mode

Due to the sudden shutdown the computer during the installation of operating system updates, clean viruses and unnecessary entries in the registry or through the fault of utilities to speed up the Windows system may be damaged files. In this case, when the system boots will appear "blue screen of death."

Try running Windows in safe mode without loading drivers and startup programs. If in this mode, the computer is working, it is necessary to remove the driver, roll back the system and scan for viruses.

In the presence of the recovery points that problem solved quite easily. You just need to roll back to a previous stable configuration.

Reinstall System Files

The above actions can not help. Then you have to reset your Windows settings and reset the system to save the file. Unfortunately, all programs will need to be reset.

In the recovery environment select the "Troubleshooting» (Troubleshoot) → «Reset» (Reset this PC) → «Save my files» (Keep my files) → «Reset» (Reset).

The system will roll back to the original settings.