Wifi problems Mac OS X 10.8.2 MacBook Pro There are hundreds of threads regarding Mac OS X 10.8.2 wifi problems, but no thread is describing exactly my issue. 

I have a MacBook Pro 2011 with OS X 10.8.2. Since around two months I have trouble with my wifi connection. 

After booting the Mac, wifi is working as usual. Connecting automatically and everything. Without any notice it stops working from one moment to another. Sometimes two minutes, sometimes an hour, but always at some point the wifi stops working. 

The system stops showing other networks within my area and only shows my network. Disabling and enabling wifi shows me the "wifi enabled" icon without a connection, but looking into the network preferences clearly states that the wifi is disabled. In addition I am not able to enable the wifi in the network preferences. 

Things I have tried so far:


Reinstalling the system (Time Machine Backup)
PREM Reset (can't count how often)
SMC Reset
Keychain - deleting all wifi connections and information


I have the Checkpoint Endpoint Client E75 installed. It makes no difference if I use it or not. In addition I have the problem with every access point. I tried public hotspots, my companies wifi (Cisco hardware) and home network. Don't believe this is related to the protocol used by the router.
If this is in your home, do you have an older microwave oven nearby? Or a 2.4GHz cordless phone? Baby monitor? Anything else "wireless" (that's not a wireless router/access point)?

Have you tried changing the channel of the wireless on the router? Many newer routers will do a "site survey" and indicate an unused wireless channel.

I have had similar problems with wireless in the past and solved it by changing the wireless channel.