How To Repair Windows 7 And Fix Corrupt Files Without CD/DVD [Tutorial] 

Repair Windows 7 startup using a built-in utility in Windows.
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Startup Repair - or Automatic Repair in Windows 8, 8.1, and Reset in Windows 10 will try to automatically repair computers that are unbootable because of any of a number of reasons.
Startup Issues this guide can help with :
Has your Registry become corrupted?
Are there missing or damaged system and driver files?
Are you experiencing Disk metadata corruption like MBR, partition table, and boot sector or file system metadata corruption?
Having issues installing problem or incompatible drivers?
Installation of Windows service packs and patches coming back with incompatible errors?
Corrupt boot configuration data?
Bad memory and hard disk hardware errors?
You will want to run a Startup Repair when you are experiencing these issues, but while its early enough that no other issues have been caused as a knock on effect.
This tutorial will apply for computers, laptops, desktops, and tablets running the Windows 10, Windows 8/8.1, Windows 7 operating systems. Works for all major computer manufactures (Dell, HP, Acer, Asus, Toshiba, Lenovo, Samsung).

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