MN510: Downladed files are corrupt

Tye downlaod speeds attached to the new wireless network
are great. Unfortunately, when I run the setup of anything
downlaoded, I am told that files are corrupt, likely due
to bad transfers.
This happens 95% of the time I download.
Does anyone know how to resolve this problem?
I am running the Base Station Mn500 (wired to a WinXP Pro
PC) and this satellite Win98 machine using the usb
wireless adapter.
Seems like a pretty poor problem to have for a wireless
network!
- Lou