See if there's anything listed under (takes a deep breath before telling you how to get tere)
Right Click menu of Wireless Connection icon Status Properties Button General Tab Configure Advanced Tab
...that looks like has anything to do with connection speed. My wireless interface would keep trying to regnegotiate to get the 'best speed', causing it to jump around all over the place and randomly fall over, until I manually told it to stop trying to do that and stick to 54Mbps. Rate/54, rather than Rate/Best Speed on that advanced tab my wireless interface, but it'll be specific to the wireless interface hardware if you have such an option at all.
Also if there are other peoples wireless networks about, try changing the wireless channel used by the router to one that none of the others are using rather than sticking with the default.
no subject
Right Click menu of Wireless Connection icon
Status
Properties Button
General Tab
Configure
Advanced Tab
...that looks like has anything to do with connection speed. My wireless interface would keep trying to regnegotiate to get the 'best speed', causing it to jump around all over the place and randomly fall over, until I manually told it to stop trying to do that and stick to 54Mbps. Rate/54, rather than Rate/Best Speed on that advanced tab my wireless interface, but it'll be specific to the wireless interface hardware if you have such an option at all.
Also if there are other peoples wireless networks about, try changing the wireless channel used by the router to one that none of the others are using rather than sticking with the default.