Windows 7 x64 professional can not start

after a few month of traying i am desperate... do anybody have some idea?

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Please post your system specs: System Info - See Your System Specs

How long has the operating system been installed?

Has it ever worked?

Have you tried a Startup Repair?

Startup Repair

Thank you for your fast answer.

The system was warking with Windows 7 more than a year. Problem occurs after one upgrade in June 2011.

I tried a lot of tools. The last was Microsoft Diagnostics and Recovery Toolset 6.5.

I figured that problem is:
DRIVER_POWER_STATE_FAILURE (9f)
A driver is causing an inconsistent power state.
Arguments:
Arg1: 0000000000000004, The power transition timed out waiting to synchronize with the Pnp
subsystem.
Arg2: 0000000000000258, Timeout in seconds.
Arg3: fffffa80018c3680, The thread currently holding on to the Pnp lock.
Arg4: fffff80000b9c510

System info:
Windows 7 Professional, 6.1 x64 OEM
Processor Intel64 Family 15 Model 6 Stepping 2, Genuine Intel
BIOS - American Megatrends Inc. 0606, 10/30/2005
Memory: 2048 MB
RAID 0 on two disk 236 Gb

Obviously, we need to find the driver causing the problem and uninstall it.

Unfortunately, I'm no expert on reading these logs so I'm hoping one of our BSOD experts will jump in.

However, the first important question is what was upgraded in June 2011 that appears to have caused this problem?

Also, did you read the links I gave you?