Wireless Internet Connection Dropping/Slow

Recently started having trouble with my Wireless internet.

Im using Windows 7 X64, have been for ages.

Recently, ive been having trouble connecting to the net using a wireless PCI Card WPN311. It connects, but basically doesn't show anything, the green bar for loading takes a lifetime.

Sometimes it seems to work fine, and load a few pages bfore starting to do it again. It will then also disconnect me from the wireless connection altogether, (Says im not connected to a network)

I've updted the drivers for this card too using Atheros and also the Netgear ones provided.

I went and bought a new PCI-e Card today, still having the same problem!

I rebooted into safe mode with networking where it seems to work fine, with the new card. I ran a spyware and vorus check using Malwarebytes and Superantispyware. It found one or two items of malware basically to do with IE hijacker, which i had no idea where there as my AV kaspersky should block these.

Anyway, removed them, rebooted, same problem, really slow, randomly chucking me off the network.

Rebooted nto Safe mode with networki again, working fine.

I've changed nothing on my PC, no new hardware added other then the new Wireless card, no new programs/games/updates installed since this started.

Itreally has puzzled me! I've changed also the Channel on ym Router (Netgear DG834PN) Doesn't seemto do anything either.

I have 3 other lptops within the house that did yesterday have a little trouble connecting but have been fine since.

Im beggining to think that my Router may have/ or is cming onto its 'lastset of legs'

Is this a possibility, i mean, i have had this router for a good 4/5 years i think nd its been on every hour of every day in that time period!

Ideas anyone? Im basically out of them!