Macbook pro running 6.8 has wifi cutting out and extremely slow

Question

My macbook Pro recently started having issues where the Airport says the wifi signal is full, yet is extremely slow(.5mbps compared to 30 that i normally get.)
It also cuts out but says it is still connected, but chrome, safari, itunes all cannot connect even to google.
So far I have tried,
Deleteing the playlist items in system configuration
restarting the router manually and from the router control panel
shutting off my airport card and turning it back on
set a new location in network preferences
setting DNS to Google DNS and openDNS
setting IPv4 settings to manual
checking the router channel
restarting my computer
setting the network utility to constantly ping
checked the preferences on the netgear router site
turning bluetooth on and off
setting and unsetting a firewall
using network diagnostics
the only thing that works is to turn airport off, then on again and reconnect. even then, I can only get a few page views, sometimes only one, before it stops loading anything. my wifi connection used to be amazing, then one day it just started doing this. I get very slow speeds when I can connect, and downloads are extremely slow.

Answer 1

I also finger McAffee as the culprit, it's not necessary on Mac's as of 10.6.8+ Apple installed their own anti-OS X malware detector and it checks for updates like every 26 hours or so.
If you need to clean the Windows malware off their files, the free ClamXav does the job nicely and doesn't bugger up the machine as it's run as you need it.
For your other slowdown issues, I suggest you look through these tips of mine, my Snow Leopard is incredibly fast.
Why is my computer slow?
Diagnosing network issues
Tune up your Mac here
For Snow Leopard Speed Freaks
https://discussions.apple.com/community/notebooks/macbook_pro?view=documents