Hi Kumar,
Welcome to Microsoft Community forum.
I would appreciate if you could answer the following questions:
- Do you have any USB devices connected to the computer? If so, disconnect them and try again.
- What is the make and model of the computer?
This issue is related to BIOS settings. You may try resetting the BIOS to default and check. Since the issue is related to BIOS settings I would suggest you to contact your computer manufacture support
for better assistance.
BIOS: frequently asked questions
http://windows.microsoft.com/en-us/windows/bios-faq#1TC=windows-7
If you need more help with the BIOS settings, review your computer's documentation.
http://windows.microsoft.com/en-US/windows/help/contact-support/computer-manufacturers
BIOS Disclaimer:
Modifying BIOS/ complementary metal oxide semiconductor (CMOS) settings incorrectly can cause serious problems that may prevent your computer from booting properly. Microsoft cannot
guarantee that any problems resulting from the configuring of BIOS/CMOS settings can be solved. Modifications of the settings are at your own risk.
Hope the information helps. Let us know if you need further assistance with Windows related issues. We will be happy to help.