I recently set up a wireless network which has been working fine up until a couple of days ago and things seem to be slowing down.

Specs:
LinkSys Instant Wireless USB Network Adapter
Windows XP Home
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LinkSys Wireless Access Point Router with 4-Port Switch
Windows 98 SE

Now the 98 box is hard wired to the router, the only two computers that are wireless is the XP box and my other utility box, which doesn't seem to be having problems.

I've gone through the troubleshooting process, from reinstalling the drivers to checking my WEP configurations, which are all the same. I'm getting an excellent signal, but my connection is horribly slow. It can be fixed by rebooting the main computer (Win98) and the XP box but I'm wondering if there is something I passed over in troubleshooting so that I won't have to reboot everytime this happens.