Power failure during boot time

Hello, I hope you can help me! I have a HP system that was upgraded to Windows 7 Home Premium x64 from Vista using the HP upgrade DVD. Everything worked fine until yesterday. The system restarted after a needed System Update and by mistake I hit the Power button during boot time. I press the button again to start and the system just does not want to boot. I have tried changing to Onboard video on BIOS setup, System Repair, System Restore and Safe Mode but nothing seems to work. I also entered commands Bootrec /FixMbr and Bootrec /FixBoot

During Safe Mode it just hangs at ahcxi64s.sys and then it restarts again. The System Repair log shows below:

Root cause found:
Unspecified changes to system configuration might have caused the problem

Repair action: System files integrity check and repair
Result: Failed. Error code = 0x490
Time taken = 849535 ms

Thank you,
Horacio Camacho

Question Info

Last updated November 23, 2017 Views 750 Applies to:
I would do this:
1. Set your BIOS so that it uses the DVD drive as its primary boot device.
2. Boot the machine with your Windows 7 Repair CD or with your Windows 7 installation DVD.
3. Press a key if prompted to boot from the DVD.
4. Log on as Administrator when prompted.
5. Select Repair when prompted.
6. Select System Restore when prompted.
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