Acer Aspire 3660 - I want to restore my computer to its original settings without recovery CDs.

Chapter 1 53
Environmental Requirements
Item Specification
Temperature
Operating +5 ~ +35°C
Non-operating -20 ~ +65°C (storage package)
Humidity
Operating 20% ~ 80% without condensation
Altitude Operating sea level 0 to 10,000ft
Storage sea level 0 to 40,000ft