i have a prolem in booting so i used hirens boot cd beagning by testing hard drive i dont found any bad sector then testing me

[fathy_naem]

i have a prolem in booting so i used hirens boot cd beagning by testing hard drive i dont found any bad sector then testing memory ram result is pass and
by using mini xp in the cd i found my all of my files then by advice of someone i used MBR ( master boot record ) program by choose to install strandard MBR
when restrat pc i get this boot device not found please install an operting system on your hard disk 3f0
and after that i use mini xp again my hard disk is not exist by the way my operting system is Windows_7_64-bit_Home_Premium_x64 compaq hp cq 61 please i want help

 

[Crixilian]

windows failed to boot is not always your Hard drive problem, your windows may corrupt, drivers or MBR
you should fix startup by using Windows 7 any version to fix it
by boot the Windows 7 Installation Media, and choose Repair Computer, Startup Repair