Task Manager

http://www.youtube.com/watch?v=OXJFFhowBGk

Computer Management

http://www.youtube.com/watch?v=r3L0-4Jz3zE

Device Manager

http://www.youtube.com/watch?v=EDxVBtBeHHg

Event Viewer

http://www.youtube.com/watch?v=J6vUOyxmU1o

Services

http://www.youtube.com/watch?v=cQRdXdJNusA

Performance Monitor

http://www.youtube.com/watch?v=eTu7OIkrMfY

Reliability Monitor

http://www.youtube.com/watch?v=-bfg0Q29Nmk

System Information (Msinfo32)

http://www.youtube.com/watch?v=Jp5w5uOLb0g

System Configuration Utility (Msconfig)

http://www.youtube.com/watch?v=WCXDxUtlcq0