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:
is causing an inconsistent power state.
Arg1: 0000000000000004, The power transition timed out waiting to synchronize with the Pnp
Arg2: 0000000000000258, Timeout in seconds.
Arg3: fffffa80018c3680, The thread currently holding on to the Pnp lock.
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