Verrrrrry Slow Internet Connection - wireless

This is a new computer with Built-in wireless LAN (802.11b/g/n).
Windows 7 Home Premium Edition 64-bit
AMD Athlon™ II quad-core processor 645*
6GB PC3-10600 DDR3 SDRAM
ATI Radeon HD 4200 integrated graphics

Router is netgear wnr834bv2 with up-to-date firmware

All windows updates installed.
All latest drivers installed.

Removed Norton, running Avast.
No viruses or malware.

When it is connected with ethernet cable the download speed (per speedtest) is 23.91Mbps but on the wireless connection the speed drops to 0.41 Mbps.

I ran it in safe mode plus network and got the same results.
Also moved computer to within 3 feet of router and got same results.

We had a desktop running Vista with a wireless connection in the exact same spot - no speed issues there. Also my laptop gets 21Mbps on speedtest in that location.

HP tech support says it is to be expected and to run an ethernet cable. If that was possible I wouldn't have bought the model with the wireless card installed.

I hope this is enough information for someone to help me.

Anthony said:

Have you tried a different driver for your wireless LAN?

No, I sort of assumed the latest would be the best. Perhaps that wasn't a good assumption - how do I find an older version? It is difficult to search for anything on that computer, I am using my laptop to surf.

I have borrowed a wireless USB adapter and I am getting 20 Mbsp downloads with that. It isn't an elegant fix and it bugs me that I now have to buy an adapter that I shouldn't have had to, but it will have to do for now.

Hate talking to myself but the latest update is the USB adapter is now down to less than 10 Mbps. Nothing else changed.

Has nobody else experienced this or better yet, found a real fix for it?

I have installed all updates and all driver updates (actually there were no newer drivers).

The installed card only shows up as "802.11n Wireless LAN Card" but it is manufactured by Ralink.

From SIW:

Network Adapter 1
Model SMCWUSB-G 802.11g Wireless USB 2.0 Adapter
Status Connected
MAC Address 00-13-F7-E9-3A-E6

Type WIRELESS LAN
Speed 54 Mbps
Network Adapter 2
Model 802.11n Wireless LAN Card
Description [14] 802.11n Wireless LAN Card
Status Connected (it can't be - the card is disabled)

Network Adapter 3
Model SMCWUSB-G 802.11g Wireless USB 2.0 Adapter
Description [17] SMCWUSB-G 802.11g Wireless USB 2.0 Adapter
Status Connected

Network Adapter 4
Model Realtek PCIe FE Family Controller
Description [8] Realtek PCIe FE Family Controller
Status Connected


Manufacturer FOXCONN
Model 2AB1
Version 1.00
Serial Number
Bridge
North Bridge AMD 785G Revision 00
South Bridge AMD SB700 Revision 00
CPU
Name AMD Athlon(tm) II X4 645 Processor
Cpu Socket Socket AM3 (938)
Max CPU Speed 3100 MHz
Memory
Maximum Capacity 16384 MBytes
Maximum Memory Module Size [unknown]
Memory Slots 4
Memory Type DDR3
System Slots
ISA 0
PCI 5
AGP 0
VL-BUS 0
EISA 0
PCMCIA 0
ExpressCard 0
MCA 0

I disabled it because it was even slower than the USB adapter.