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Weirdest wireless issue I've ever seen, totally stumped.

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Hi guys,

I recently bought my girlfriend a PC so that she can play games which wouldn't run on her laptop. We can't have a cable connection as the property is rented and we're a few floors above the router itself due to the way the house is built.

To connect her to the internet, I bought this PCI card: http://www.amazon.co.uk/gp/product/B...?ie=UTF8&psc=1

I bought it because I use one myself, the PCs are about 5 feet away from one another in the same room, and I figured it couldn't possibly go wrong. It did. The first signs of this were that it wobbles slightly in the slot for some reason, no matter how snugly I ensure that it's sitting in there, or how tight the screw is. Before we upgraded our internet, hers would barely connect. I explained this using the fact that the superhub we were using is notoriously terrible.

We then upgraded to a far better router and connection, and the issue has only really compounded itself. It's now a solid 5 bars for her all the time, whereas before it was unstable. However, when she connects to the wireless, it becomes terrible for everyone else. If she's connected and a page is (eternally) trying to load, no-one will be able to load any other pages, the internet might as well be dead. When she disconnects, it sorts itself out pretty soon.

I'd think it was the hardware, especially given the way it wobbles a bit in the slot, but I swapped her card with mine and the problem is still the same. When plugged into my PC, her card suddenly works just fine, and mine stops working when I put it in hers. It makes no sense.

Could it be a software issue of some kind? Could the motherboard be toasted somehow? It's brand new!

When did computers stop making sense? Any suggestions are welcome, thanks in advance!

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