Probably best to find out what kind of router you have. Then go to website of maker. There will be FAQs, may be a forum, about how to fix a possible tired router. On back or on bottom of router you can see model and revision number.
If you want to flash router be very sure it is done after the book. Do that as last resort.
For now you simple turn power off router, wait 1 min. or so, turn it back on. Resetting is likely done by holding down a button on back, but dont do it until you have been at website. Preferably been told by them to do it. They will since standard procedure when things are ??? Details are required though. And more importantly your own settings, like details about wireless, encryption etc., all that will be gone and you must set it up as if router were brandnew. If someone did that for you there could be a problem. Like you dont know how! Some info, most you need actually, you must know since you have changed wireless adapter. Just that moving from bad to worse is not progress. So only reset if you know how to log in to router and set it up.
Safe enough to power on/off but much more action is up to you. Nothing major really but must be done correctly.
What firewall you have? If a 3rd. party one does it have a default/reset option - uninstall also?
Actually also look at the one in Windows if that is what you use.
Wireless software is latest version direct from website? Not old from a cd? If you set up software wrong, like using wrong encryption you should not be able to appear connected or even browse a secured site. 2 software packages for 2 dif. adapters dont work? Not so likely - smells more like a Windows problem. XP does have ability to set up wireless without that software? I think it has. So you could try uninstall and use build-in wireless from XP. Initializing build-in wireless might kickstart or magically fix something, or not - trial and error.
If stuck find that forum dealing with router brand. If not on makers site then try http://www.dslreports.com/forums/all
They are used to such problems, diagnosing them properly too, so aware of weird issues. Give them all details of brand, model number - what you have been doing up to now. May be obvious once you find solution, oh I just changed usb port!, may be only make sense to connection-geeks.
Edited by Bambo, 06 September 2009 - 10:22 PM.