My laptop doesn't boot after a shock, it shows that there is a failure in the fixed hard drive, I moved the drive in to fix it, it wasn't fixed well. The computer works normally but, I feel it's little bit slower than before, Is that related to the problem of the Hard drive ? Is there anything to worry about ? NOTE: This computer is new, was used for 1 month.

Opening the case may have voided the warranty. You could try running a drive fitness test on the drive. Download from the manufacturer's site.

Yes I agree with Onthe Hill

I ran that test. Actually there is a test on the BIOS, I used it to test all the parts. It says everything is going okay. After that test the computer runs again as it was before, I don't know how but, it works okay.