computer disconnects from the internet every 45-50min

[BobSagget]

My computer has been disconnecting from the internet and  disconnects after 45-50min. I finally got fed up with it and decided to seek help.  I have no idea why it's doing what it's doing outside of a whole bunch of free driver scanners have told me I have a bunch of stuff I need to update such as NVIDIA networking controllers and NVIDIA network bus enumerator.  I can provide any information you may need and will definitely appreciate any help I can get.  Thanks

My internet is cable with a hardwired modem connection. There are 2 other computers on with mine and they work fine.

Some stuff about my computer that I could find is (this all comes from Belarc Advisor except the stuff on the bottom):

Windows XP Professional Service Pack 2 (build 2600)
2.40 gigahertz AMD Athlon 64
Board: ASUSTeK Computer INC. A8N5X 1.XX
Bus Clock: 200 megahertz
BIOS: Phoenix Technologies, LTD ASUS A8N5X ACPI BIOS Revision 0902 03/20/2006

Controlers:
NVIDIA nForce4 Parallel ATA Controller
NVIDIA nForce4 Serial ATA Controller (2x)

Bus adapters:
AUOQM7SB IDE Controller
Standard Enhanced PCI to USB Host Controller
Standard OpenHCD USB Host Controller

Display:
ATI Radeon X300/X550/X1050 Series [Display adapter]
ATI Radeon X300/X550/X1050 Series Secondary [Display adapter]
Sceptre Gamer [Monitor] (19.1"vis, March 2005)


Multimedia:
Envy24 Family Audio Controller WDM
MPU-401 Compatible MIDI Device
Standard Game Port

Some other stuff I found is this, dunno if it means anything:

ATI External Event Utility for Windows Version 6.14.10.4180
ATI Smart Version 5.13.0027
ATI Technologies Inc. - Catalyst Control Centre Version 2.0.0.0
NVIDIA Firewall. Version 2.2.0.488
NVIDIA nSvcIp Version 2, 2, 0, 464
NVIDIA nSvcLog Version 2, 2, 0, 464


PC Pitstop Driver Alert says I have:

ATI Radeon X300/X550/X1050 series version 8.432.0.0000
ATI Radeon X300/X550/X1050 series secondary version 8.432.0.0000
NVIDIA network bus enumerator version 4.8.2
Envy24 Family Audio Controller WDM version 5.12.01.3651
NVIDIA nForce Networking Controller version 4.8.2

My friend and I built this computer, though I don't know much about software, that was more his thing. Anyway, if you need anything else I'll be happy to try to find out.

[Joey]

Hello,

Is Bob Sagget really your name? 

Having outdated drivers can and will cause problems when you are playing the latest games and may negatively affect your overall system performance. The worse case scenarios is that your computer will freeze. But with all of that said outdated drivers will not give your PC any type of Internet problems that you just described.

Here are 2 scenarios and 2 possible fixes for your problem…

#1 You may have a bad Internet/network router port (the one that connects to the computer in question). To test this theory disconnect the network cable (that plugs into your router) from one of your computers that is working on the Internet 100%. Connect your Internet-malfunctioning computer to it.
If the problem still persists then go on to the next step.

#2 I have see viruses and malicious software mess around with the Internet connection on computers, some of them even permanently disconnecting you from the Internet. Run the following 3 programs in order to find and kill all viruses and malicious software on your computer.
1. Malwarebytes’ Anti-Malware. Download and install the Free version. Run a Full/Thorough virus scan on your PC http://www.cleartechinfo.com/Learn-How-To-Remove-AntiVirus-2009-Malware
2. SUPERAntiSpyware. Download and install the Free version. Run a Full/Thorough virus scan on your PC http://www.superantispyware.com/download.html
3. Kaspersky Anti-Virus 2010. They have a free 30-day trial that is full-featured. Download and install it. Run a Full/Thorough virus scan on your PC http://www.kaspersky.com/trials
4. Finally Clean and Optimize your PC with the free CCleaner. Perform the 2 steps mentioned in the video (which includes the Registry cleaner) http://www.cleartechinfo.com/Learn-How-To-CCleaner-Clean-Optimize-Free-Up-Hard-Drive-Space-Windows