While formatting pendrive suddenly my laptop stopped working

Hello Everybody,
Yesterday I was getting trouble from my pendrive while copying file to other PC.Few files get copied and for others it get stuck and explorer says "Not Responding" so i tried to format and my laptop got freezed.
After restarting it stopped at logo several times .I noticed when i start the laptop the dell logo appears for longer time then usual so i gave some time to start and it got started but can't do anything as the cursor keeping on rolling .This happened ocassionally but freeze at dell logo and at window 7 logo all the time.

I tried using safe mode but failed to start.
Also I tried startup repair but no result.
One more thing I notice is "HDD led is constant rather blinking"

What should i do to make my laptop alive.

Check the hardware with Dell Hardware Diagnostics from F12 Menu
running both the Diagnostics and the fuller Utility Partition choices.

If hardware checks out work through the steps for Troubleshooting Windows 7 Failure to Start

Thanks for your reply.
I ran the diagnostic and it showed a error 2000-0142 .
Msg - Hard Drive 0 - self test unsuccessful .

What should i do now ?

There's a fuller diagnostics suite sometimes on F12 under Utility Partition. Try running that too.

Then confirm the HD's condition with the maker's HD Diagnostic extended CD scan. If it doesn't have one use Seagate Seatools or Partition Wizard CD partition surface test

My Laptop don't start so how do i perform surface test .
Also seagate tool is not supported my HDD it show "INVALID" in Dos.
NO Utility Partition found .
Now I am looking for Hitachi tools .

That's why I specificed to use the Partition Wizard CD. Download the ISO and right click it to burn to CD with Windows Image Burner. Boot to run test as shown in video link.

First time I've seen Seatools not work on another brand HD. Thanks for reporting it.

PW should confirm the HD condition sufficiently.

Hello gregrocker,
I just ran LiveUbuntu through USB and I can access my files so I am trying to copy all my relevant stuffs.All Drive D,E,F are accessible and C drive shows few folders (Boot,System Volume Information ,Temp and few files) .
Is there any thing can be done from here .
Please advice.

Confirm the HD condition. If HD is confirmed bad, replace it with an SSD which is the best upgrade one can get for Win7 - even faster than buying an expensive new PC. Google your model for a video on how to replace hard drive. Be extremely careful not to drop screws inside or allow static shock to jump to electronics.

Then do a perfect Clean Reinstall - Factory OEM Windows 7. Read the Special Note To Dell Owners at the end.

Hi gregrocker ,
I tried to run partition wizard for surface test and after 50- 60 % laptop get showndown automatically don't know why.
I think i have to buy new HDD .
Also may you tell me after buyng new hdd if i fill bad sector by zeros can that make it usable .
Thanking you for your support.