For Dell this is often printed somewhere on the underside in the form of a Service Tag and an Express Service Code.
And at least replace the CMOS battery (CR2032 coin cell) with a new one. Do you feel that your site slowlyness is killing sales or traffic?
If you are replacing the hard drive, you’ll have to transfer the caddy and connector to the new drive.
Before you remove the wireless card, you’ll have to disconnect both antenna cables pointed with green arrows.
In this guide I will disassemble a HP Pavilion dv9000 laptop.
These instructions will help you remove the hard drive, memory, wireless card and keyboard.