Voted Best Answer
Oct 16, 2013 - 12:15 AM
IDLE temperature (meaning the laptop is not doing anything) around 30-50 degrees celcius is perfectly normal. Idle temperature varied depending on what kind of processor and cooling setup you have.
FULL LOAD temperature (meaning the laptop is working hard) can vary anywhere from 50-100+ degrees celcius. I think most people would agree that anywhere above 70 degrees celcius is getting on the warm side. You can usually remedy this by cleaning out the dust in the laptop, especially if it's 4 years old and you haven't cleaned it yet.
Keep in mind that different processors have different ranges of operating temperatures. For example, My CPU can go up to 100 degrees celcius before automatically shutting down to prevent damage. Yours may be different though. laptops aren't actually meant to rest on your lap. It needs a hard flat surface so airflow is sufficient and nothing is blocking the vent.