"booting msgr is missing. press control+alt+del to restart" My laptop is constantly displaying this when i boot.

[Shivamxgoswami]

i have tried booting from my USB but when i run the repair option it dosn't start. What should i do now?

 

[D_Know_WD]

Hi there Shivamxgoswami,

It seems that your boot sector is either damaged or missing.
Here's an extensive tutorial on how to repair/rebuild it: https://support.microsoft.com/en-us/kb/2622803

In case none of these work, you can use some data recovery tool for DOS mode, back up the data stored on the drive and reinstall OS.
Afterwards, it would be nice if you test the drive: http://www.tomshardware.co.uk/forum/282651-32-best-diagnostic-testing-utility

Cheers,
D_Know_WD