I knocked myself offline, need help with MiFi

Oh god I haven't seen or used a Windows XP computer in ages. That was two OS's ago. But, have you tried to remove your adaptor and plug it back in again? There could be something wrong with the adaptor controls, or the abator itself. Because disc clean up should not "remove" any files that effect your wireless device. And, since your laptop hooks up just fine, leads me to suspect that the problem might lie in your adaptor. Another thing that could've happened, is in the process you might have accidently turned off your radio receiver not allowing the adaptor to detect a wireless connection. The wireless card must be on for the adaptor to work proprally. All adaptors do is boost the existing wireless card giving it a slightly wider range. THat's all I can think of at the moment that might help you out with your wireless device. But, from the sounds of it... sounds like your adaptor may be the thing at fault. Those things can die just like anything else.