All Windows
Aright so u want to know how to turn the pc on in 10 seconds (may vary)Aight heres what u have to do to turn ur pc on in 10 seconds

Aite Click on the start button then press R it will take u to Run well go to run
n type Regedit
press enter
this will open Registry Editor
now look for the key

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Content Index

now there find the Key Called
"Startup Delay"
Double Click On It
Now where its Base
Click Decimal
Now its Default Value Is 4800000 (75300:hexadecimal)
Change The Value To 40000
here u go u have done it
now close the Registry Editor and Restart Your Computer