USB Wireless Adapter OR PCI wireless card?

[Japracool]

Damn, I’m confused. Actually I have already got a PCI wireless card using Tenda W302P (see picture above) in my desktop. But the Internet keeps being disconnected (don’t know why), after surfing from Internet I think it is because Tenda W302P is not compatible with 64-bit Windows 7. From W302P 11N Wireless PCI Adapter-High Speed Wireless-N-Tenda (the product overview), it also said that it only support Windows 2000, XP, 2003,Vista operating systems. Doesn’t mention Windows 7. Now I want to buy a new one, either USB wireless adapter or PCI wireless card. Any suggestion? I want the strong one (signal)!

Source: Japracool.com

[Experimental]

I didn't understand a whole lot of what you said but here's my problem and maybe someone can help me too. I have a wireless card on an old Dell laptop. I am having a LOT of trouble with getting kicked off of the internet. It will only hold a few minutes at a time for some strange reason. I know my wife's laptop (which is brand new) will stay on forever but like I said, it's brand new. Can somone one help a poor old non-tech savvy man?