Explorer.exe has stopped working

I own a Vista Home Premium 64-bit, SP2.

Whenever I try to view the properties of My Computer, Explorer.exe stops working. This is one of many problems I got on my Vista, but I guess I should start here. Can anyone help me?
 

My Computer

Welcome
Start with a full anti virus scan. Download and make a full scan with malwarebytes, use the free version. Post back after you have made the scans.
 

My Computer

System One

  • Manufacturer/Model
    Dell XPS420
    Memory
    6 gig
    Graphics Card(s)
    ATI Radeon HD3650 256 MB
    Sound Card
    Intergrated 7.1 Channel Audio
    Monitor(s) Displays
    Dell SP2009W 20 inch Flat Panel w Webcam
    Hard Drives
    640 gb
    Cooling
    Fan
    Keyboard
    Dell USB
    Mouse
    Dell USB 4 button optical
    Other Info
    DSL provided by ATT
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