1. Open System Information by clicking the Start button [image]. In the search box, type System Information, and then, in the list of results, click System Information.

2. Click System Summary in the left pane, and then look under BIOS Version/Date in the right pane to view the BIOS manufacturer, version number, and the date the BIOS was released. For specific information about the BIOS used by your computer, check the information that came with your computer or go to the computer manufacturer's website.

Chip inside your computer that saves your BIOS settings. As a result, the terms CMOS and BIOS are sometimes used interchangeably.

Complementary metal-oxide semiconductor, or CMOS, typically refers to a battery-powered memory chip in your computer that stores startup information. Your computer's basic input/output system (BIOS) uses this information when starting your computer.

Specification for configuring some x86 computers.  It consists of a method for storing configuration information in nonvolative BIOS memory and three BIOS functions for working with that data.

The ESC data is usually stored in the battery-backed CMOS RAM on the motherboard.

This data contains information about PNP (Plug and Play) devices like expansion cards

Power supply

Most power supplies can only fit one way in the computer case. Three or four screws usually attach the power supply to the case. Power supplies have fans that can vibrate and loosen screws that are not properly tightened. When installing a power supply, make sure that all the screws are used and tightened correctly.

To install a power supply, follow these steps:

Step 1. Insert the power supply into the case.

Step 2. Align the holes in the power supply with the holes in the case.

Step 3. Secure the power supply to the case using the proper screws.

The CPU and motherboard are sensitive to electrostatic discharge. When handling a CPU and motherboard, make sure that you place them on a grounded antistatic mat. Wear an antistatic wrist strap while working with these components.

CAUTION: When handling a CPU, do not touch the CPU contacts at any time.

Before installing the CPU, make sure you are familiar with the locking assembly.

Thermal compound helps to conduct heat away from the CPU. When you are installing a used CPU, clean the top of the CPU and the base of the heat sink with isopropyl alcohol and a lint free cloth. A paper coffee filter works well as a lint free cloth. This removes the old thermal compound. The surfaces are now ready for a new layer of thermal compound. Follow the manufacturer recommendations about applying the thermal compound.