Hello Gediminas, I am afraid to say that this motherboard has been out of support since June 2010. http://www.intel.com/support/motherboards/desktop/sb/CS-031583.htm
These are some recommendation I can give you:
1. Access the BIOS and run default settings. Make sure the SATA controller is set as AHCI or RAID depending on the setting you had when Windows was installed.
2. While you’re on BIOS, check if the hard drive is being recognized.
3. Clear the CMOS. The correct way is, while having all components disconnected from the motherboard, disconnect the BIOS jumper and remove the battery for about 15-20 minutes.
You might need to do a clean installation of the operating system.
Thank you Sylvia for replay. I have found problem cousing this strange situation. It was HDD's jumper set to slave mode and this strange situtaion accured. After setting back to master mode probelm wanish. I have learned my lession to always check jumpers first
I'm glad to know you solved it.