Hi Rajesh,
Thank you for your response.
No I had this problem of blue screen before re-installing the OS too.
That time i contacted with dell customer care.She told me to run diagnostic (by using F12 key).
It didn't showed any problem so she suggested me that your laptop is fine and since now its one year you should re-install the windows.Your problem will be resolved.So I did but still the problem not solved.
As you told i run the diagnostic(by using F12 key) now also its not showing any problem.
I was not able to run diagnostic with FN and power key as u suggested.
Can you please elaborate which status I should check in Safemode with networking???
As Rick's response i replied with the report please check it.
Waiting for your response...
Thanks and Regards,
Shruti.