Weird Internet Issue

[jjjackier]

I'm using: P-2812HNU-F3
Not sure what the mobo is, but my pc is an Asus K53SK made by AsusTek.
Power supply? The fu** should I know, I'm using a Laptop for gods sake.
Adapter: Atheros AR9002WB-1NG Wireless Network Adapter
Im using Windows 7 Home Premium 64bit.
My ISP: Telenor Norge AS

So, this has been happening a few weeks now.
My internet has been really weird lately.
1 month ago I could go on any page, download anything without any problems.
But after I did -tcp on my Steam launch parameters it suddenly just broke.

When I open Steam, I have to write my password like 6 times before it works, because I get this: Steam cannot connect to the network or something like that, and not JUST Steam.
It's been happening on my games too, when I try to find a server, it only finds like 6 servers in 3 minutes.
Sometimes it opens pages without problems, and sometimes it says I need to refresh the page, won't work. Wait like 3 minutes and BAM it opens the page. Then it's back to refreshing.
It's not happening on my other PC, works perfectly fine.
What do I do?
I've even had to reinstall Windows 7, but no fix.

Please help!

 

[A_Goat]

Did you recently download any antivirus programs?
And make sure your default server request didn't change ie trying to find servers for europe vs your location

 

[jjjackier]

Did you recently download any antivirus programs?
And make sure your default server request didn't change ie trying to find servers for europe vs your location

I was using McAfee, but I thought it was the person firewall ruining my internet, somehow.
So I uninstalled it, went to windows firewall and allowed it, it didn't work.

Then I installed BitDefender free version, and STILL doesn't work.