[dkredsox1]

I recently upgraded my laptop (Acer Aspire 5738ZG) from Vista Home Premium to Windows 7 Home Premium. Everything works fine except that my Wireless connection Speed has dropped from 300Mbps to 150Mbps. As far as I can tell, I have lost one of the two bands. My router is a DIR-655 D-Link and the wireless network adapter is an Atheros AR5B91. I have updated the driver on the atheros adapter, and am using the newest firmware for the router. I realize that the speeds were probably never 300Mpbs (and that this transfer rate is way over the capacity I use) but I nevertheless must have lost half my capacity and I would dearly like to recapture it. I am using the same router specifications as before: mixed n/g/b auto 20/40mhz. If anyone can help me reactivate my second band, I would really appreciate it. Thanx!

[JohnWill]

I'd be looking at the wireless drivers, they're the only thing you changed.

[brandonbr]

Check out the type of encryption it is set to use. If you are using WPA it may be set to TKIP. Mines was set to TKIP and I switched it to AES which increased the data transfer rate.