Linksys WMP11 only works with Install CD in drive (solution)
I'm posting this to as many relevant forums as I can think of because Linksys' technical support doesn't seem to care ;-)
There is a bug in the installer of some versions of the WMP11. The installer sets a registry value incorrectly. The registry value has the path to a particular file, only it's set to the *install path*. Result: When the driver CD is in the CD-ROM drive, the wireless card works. Eject the CD and reboot, and the wireless card quits working. A quick solution is to copy the install files to the hard drive and do the install from there, but uninstalling doesn't remove registry settings, so that won't work unless you're installing the card for the first time.
The fix is relatively simple. Be sure to back up your registry first and yadda, yadda. yadda.
HKLM\SYSTEM\CurrentControlSet\Services\PCANDIS5\ ImagePath: \??\D:\AutoRun\PCANDIS5.SYS
We located PCANDIS5.SYS in C:\WINNT\System32\. Removing D:\AutoRun\ and replacing it with C:\WINNT\System32\ did the trick!