Strange Problem With Wireless Dropouts

[Chimaera]

Hey all

Not been able to resolve this problem so i thought i would see what you guys think.

On my network i have 2 pcs hard wired to a Netgear WNR2000 router and also 2 laptops, both recent less than a year old probably on the wireless

The 2 hard wired machines and one of the laptops are all on windows 7 but the last laptop is the problem

Its running windows vista

For no reason at all it loses the wireless and gets a yellow triangle and she cannot get back on unless i reset the router.

For info i have replaced the router with an identical one

i have made sure she is upgraded with all updates and have got her the latest wireless drivers.

Router firmware is the latest

Ive tried renaming the SSID, rebooted all machines and re added to network and she failed after less than a day

Things that can contribute to it happening

If i leave my master wired pc idling for long periods of time, this seems to trigger it for some reason but i cant fathom why

This is a really annoying issue that i cant seem to resolve

Any suggestions?

[Tripredacus]

I've seen this happen on notebooks that are over-heating and/or the wireless cards are failing. This was a known issue (for example) on the HP DV notebook series.