- Thu 4th Jun 2015, 11:42
Well, why do you blame it on your network adapter? Have you evaluated your router's signal relaying capacity up to the 2nd floor? If you know, it was previously working well and the problem started lately, still you got to analyze both.
Some routers come with a double antenna and cater to increased ranges. So, let a network expert evaluate your router first. If everything is fine, you may opt for a "Signal booster" for a wireless router.
Even if you buy a new network adapter, it may not do the trick since you live in the 2nd floor. I think the issue here is the signal range and amplification. So, think in that angle.