Computer disconnects from network every 6 hours

[Titoist]

My computer disconnects from my home network every 6 hours exactly. When I attempt to connect again it claims that my Network Security Key is invalid and that I should put in the correct one. This is really stupid and the computer will then reconnect to the network by itself in 5min since it was first disconnected. This only occurs on my desktop out of the 4 other computers that are connected. Whats going on here?

[Anarcho-Capitalist]

What kind of router, network cards, etc do you have?

Any new installations on that particular computer?

Did you update the drivers/firmware for everything that could be affected?

[Inctye]

Ah, this is the single biggest and classic router annoyances that will drive even the most experienced computer users nuts. I would definitely start by looking at the router settings and adjusting them to prevent interference. Sometimes upgrading/downgrading firmware releases can fix the issue.

[mduren2445]

something is refreshing your ip address at a regular interval....if your are wired try changing to a different port or wireless a different channel and if the problem follows you then do a through virus and spyware scan and check the other computers on the network

[Titoist]

Router: D-Link DIR 625 Rangebooster N router

Network Card: PCI Rangebooster G WDA-2320 108Mbps

Firmware is up to date on both. I have Vista managing the network connection because D-Link is stupid and still has their software crashing on Vista when I boot it up.

No new installations on the computer at all since I installed the PCI card 2 weeks ago. I called D-Link, they told me it was defective so I exchanged it (twice) and still have the same issue.

[Titoist]

I have checked router settings and everything is in order, which explains why the other computers aren't experiencing this problem.