I lose bluetooth connectivity with lion on iMac 21.5. Have to reboot to get it to work again.

Since upgrading to Lion on my iMac 21.5", once a week I lose bluetooth connectivity and have to reboot to get my keyboard and mouse to work.

Backup up your data from both, and as long as you used Bootcamp to install the Windows partition you should be fine.
If you used another method, or have more partitons on the drive than Bootcamp, DON'T upgrade to Lion, unless your prepared to rebuild the entire drive, install Lion from boot DVD's you make from the installer and so forth.
Google "Egg Freckles Lion boot DVD" for details also Google for "Make copies of Snow Leopard install disks"
Snow Leopard is stable, Lion has issues with older Mac hardware ranging from video to wifi to slow downs to radical UI changes.
With all the effort placed in setting up Windows and OS X, to do that all over again to take a chance that Lion won't work on your machine is a a lot of risk for little in return.
When Lion is stable then consider it, but right now it's not.

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