I'm still laggy after defragmentation, so I read up on the troubleshooting manual that said I had internet connection problems.
Connection Status:
Operating state: Associated with access point
Signal strength: 99%
Signal quality: Excellent
Transmit rate: 54.0 Mbps
Wireless ... is it not fast enough? *O* -headdesk-
My laptop doesn't get very hot, so I don't think I need to clean out the fan.