I recently bought a Dell XPS One with a Broadcom 802.11n Network card
and wireless is slow and unusable.

My home network consists of a Motorola Surfboard cable modem via
Comcast broadband service connected to a Linksys Wireless-N WRT150N
router (configured w/ no WEP or Encryption - it's open) via CAT5E
cable. The LAN has two WiFi-G enabled laptops and w/ Desktop all w/
WinXP Pro working efficiently and flawlessly for over a year. This
Dell XPS One is a new machine introduced.

I connect the Dell XPS One w/ the Broadcom 802.11n Network card and
Windows Vista Home Premium SP1 and the issue begins. BTW, the issues
existed before applying the Vista SP1. For example, downloading a 3mb
file takes over 3 to 5 minutes on this machine via WiFi. In contrast,
on one of the other home LAN machines w/ XP and differant hardware,
this takes less than 30 seconds. Also, I have skipping in YouTube
videos and file copys from machine to machine in the LAN taking
forever.

I checked the Wireless card properties on the offending machine and
all settings look correct - im registering at 130 Mbps speed
consistently according to the WiFi status. I looked at the wireless
card driver and it appears to be the latest, however when I checked
Dell's website it looks like their may be a newer one that arrived
just this month. However, when I download and go to update the driver
in device manager it says that I have the latest (the existing driver)
and does not install the newer one.

One other test I did was to plug in a cat6 ethernet cable from the
router to the back of the machine. It appears that my WRT150N router
only has 100/Full from the LAN ports so I received a 100Mbps
connection vi auto-negotiate setting. This is slower than the 10Mbps
that the WiFi card status was reporting, btw. So, I did a download
from the same site and bam, slower than XP machine, but way faster
than the troubled WiFi connection - maybe 45 seconds to a minutes and
it was done.

Do you think this is a bad WiFi card in the machine, driver issue,
Windows Vista compatability, or any of the above?