Windows 7 - black screen at login, no user?

Turn on your computer and turn it off before the login screen to bring up windows startup recovery.

The System File Checker (SFC) will replace any damaged/missing files on your system. You might need to get hold of an install disk for your operating system (XP/Vista/Win 7), borrow one if possible, (any one will do as long as it's the same version eg:Home/Pro/Basic/Premium etc.). Start in SAFE* mode and click Start, and type in the search bar: cmd (If you can't access the search bar, press and hold down the Windows logo key (either one with the flag on it, bottom row) then tap R) and press Return/Enter.

In the command shell box, type sfc /scannow (note the space between sfc and /scannow) and press Return/Enter. If asked to insert the Windows disk, do so. When the scan finishes, re-start.

*Note: On start up (before Windows loads) keep tapping either F5 or F8 (be aware that some manufacturers use F8 for system recovery!) then use arrow keys to highlight 'Safe Mode' and hit Enter/Return, click on a user account, enter the password (if you don't know it, there probably isn't one so leave it blank) and hit enter/return. ©Techno.

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