I recently ran in to a bit of trouble with the emulator/ test devices. This is what worked for me:
I uninstalled everything java, and the android sdk
Reinstall android SDK and install packages for 2.2.2 and 2.3.3
Reinstall java for my browser
After I did this, I was able to launch an app on an emulated device and on a test device. I am using 6.6.2 (rc2) and 6.5.2 on a 64 bit windows 7 machine. Hope this helps.
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