Hi, hopefully some of you guys can help me out with some problems I've been having lately. Here are my computer and network specs: I have a Mid-2011 Base model 27" iMac with 4GB RAM and the 2.7 ghz intel quad core i5 and standard 1TB HD running OS X Version 10.8. For my router, I have a Linksys Cisco EA3500 Wireless Router. Not sure if this is important, but Comcast is my ISP. For the past few months (including before I bought Mountain Lion) I've been having some internet connection issues. I'll explain: I'll have my computer sleeping, and I'll sit down and wake it up. Then I'll open up Google Chrome, Safari or Firefox and proceed to browse around online and possibly watch some videos. All of a sudden my internet browser page says "This Webpage Is Not Available" or "No Internet Connection Detected" or something along those lines. So then I have to disconnect from my WiFi Network, and reconnect again. After I do this, my computer stays on the connection for about 10 minutes max, then I get disconnected again, or dropped, I'm not sure which is the correct term here. Then I have to repeat the process again, and disconnect, reconnect, etc. etc. No other computers in my house seem to have any internet connection issues. I have an old G5 iMac that actually works faster and stays connected to my Wifi 100% of the time. My old HP laptop doesn't seem to have an issue staying connected either. My brother is directly plugged in or "hardwired" to our wireless router, and I'm wondering if he might be contributing to the network issues somehow. He's a huge gamer and him and I, both built his PC together. His PC is nothing too "insane" but it's pretty powerful. I wanna say he's running an Intel Core i7 3770 and a superclocked nvidia evga560. (I don't think his specs are important but I want to give you guys an idea of how powerful his computer is). He often runs multiple games and other chatting programs at the same time. My concern here is that maybe he's maxing out our provided MB from comcast, but I highly doubt it. Let me know if this is a possibility. ANYWAYS: I followed all the instructions on apples site, I created a new location, etc. etc. but none of it worked. I literally do not store anything on my computers HD as I store it all on external drives. So I don't think my computers getting "bogged down" either, because I still have 900GB available on my internal HD. I also regularly run CCleaner and I also repair disk permissions regularly. I just am stumped to what it could be. I moved my computer out of my room and into my living room to see if I might be having interference issues, and i thought it worked because it didn't drop me right away, but after about 25minutes online, it dropped me again. Sorry this was so long, I don't think all of it I "needed" to say, but I want someone to be able to properly help me diagnose my issue. Any help what so ever would be greatly appreciated. Thanks again, and sorry about this long OP.