Hello jaishreeram, welcome to the HP Forums.
It appears that you're getting a message on your Notebook about the cooling fan not working correctly. I will do my best to assist you with this.
Before we get started just a few questions to get some additional information.
What's the Model and Product numbers for you Notebook?
(How Do I Find My Model Number or Product Number?)
What's the currently installed operating system on your Notebook?
Did you make any changes to your Notebook prior to this error occurring?
Do you have an numeric error codes with the message?
Where/when does the message occur?
Please reply with answers to the above and I will look into this for you. Thank you for posting on the HP Forums.