Half-Life Fallout: Steam Disconnection - Half-Life Fallout

Ok.. I have found out the hard way that 'Steam Support' is complete useless. All they do is tell you the same thing over and over in various ways.

I am having disconnection problems. To make this simple I will list everything that has been done MULTIPLE TIMES and has failed.

1) Re Installed Steam
2) Re Installed CS 1.6
3) Deleted Steam.dll Registry blob ect. Then re-started.
4) Talked to my ISP personally and their end is good.
5) Opened Correct Ports on router
6) DMZ Server my IP
7) Disabled Router firewall
8) Uninstalled anti-virus
9) Disabled Windows Firewall
10) Stopped all Background process's

I get these error messages
"Steam lost connection." (Most common)
"Unable to connect to server because steam lost connection"
"Client Timed out because steam lost connection. Please check firewall blah blah"

I've even gone around my router to my modem and I still get d/c.

It's pretty random happening. Sometimes 1 minute into a game, sometimes 8-10 minutes into a game.
Nothing else gets d/c besides Steam and CS when I am playing it. Sometimes it will disconnect when I'm just chatting with someone.

Specs.
Operating System
MS Windows XP Home 32-bit SP3
CPU
AMD Athlon XP
Palomino 0.18um Technology
RAM
1.50 GB DDR @ 133MHz (2.5-3-3-6)
Motherboard
KM266-8235 (Socket A) 40 °C
Graphics
DELL E773c (1024x768@60Hz)
S3 Graphics ProSavageDDR
Hard Drives
39.1GB Western Digital WDC WD400EB-11CPF0 (PATA)
39.1GB Western Digital WDC WD400BB-75FJA1 (PATA) 34 °C
Optical Drives
NEC DVD+RW ND-1100A
Audio
Realtek AC'97 Audio for VIA ® Audio Controller


Network
You are connected to the internet
Connected through Realtek RTL8139 Family PCI Fast Ethernet NIC - Packet Scheduler Miniport
IP Address 192.168.1.150
Subnet mask 255.255.255.0
Gateway server 192.168.1.1
Preferred DNS server 192.168.1.1
DHCP Disabled
Adapter Type Ethernet
NetBIOS over TCP/IP Enabled via DHCP
NETBIOS Node Type Hybrid node
Link Speed 0 kbps

Welp, you have done everything possible there is to do.

My thoughts on it:

Your ISP could be affecting your connection simply because steam is not on a "web" port. Make sure you have the following setup in your router:

Steam Client 
UDP 27000 to 27015 inclusive (Game client traffic)
UDP 27015 to 27030 inclusive (Typically Matchmaking and HLTV)
TCP 27014 to 27050 inclusive (Steam downloads)
UDP 4380

 
Dedicated or Listen Servers 
TCP 27015 (SRCDS Rcon port)

 
Steamworks P2P Networking and Steam Voice Chat 
UDP 3478 (Outbound)
UDP 4379 (Outbound)
UDP 4380 (Outbound)

My old old ISP kept disconnecting my IRC chat because it blocked the ping mechanism to keep the connection alive, so it can still be on your ISP and there isnt much to do? Has this happened recently?

Another sure method is to simply take your computer to another house or neighbor with a different ISP or internet service and check if you still have the issue. They could also bring their machine to your house to see if its your ISP or your machine.

Ya it happens 24/7. Every time I go to play it d/c me randomly in-game.

My Ports:
http://i1241.photobu...portsopened.jpg

Ok, I got a new Router. An advanced gaming one. I have opened up the ports and triggered 27017 - 1000 to 10000. Now it gives me a Steam message saying "This game is currently unavailable, Please try again later."