Re: USB wireless adapter
ISP is irrelevant as long as you have the appropriate modem, which they should provide.
I'm assuming you already have a wireless network hooked up? Is it Wireless B,G, or N? These are different revisions, and each offers a different speed. No need to buy anything faster than your network supports.
If your router/modem is in the same room as the desktop, a wired connection would be better though. Your motherboard should have a built in ethernet port.
Account no longer active. Contact info available in profile, if anyone cares to reach me.