Start your pc very fast

first Click on the start button then press Run
n type Regedit
press enter
this will open Registery Editor
now look for the key

HKEY_LOACAL_MECHINE\SYSTEM\CurrentControlSet\Control\ContentIndex

now there find the Key Called
"Startup Delay"
Double Click On It
Now where its Base
Click Decimal
Now its Default Value Is 4800000
Change The Value To 40000
here u go u have done it
now close the Registery Editor and Restart Your Computer