I have searched the forum and tried many of the ideas given. But my blackberry is still running terribly slow and seems to freeze up anytime I click on an application only to be followed by the "not enough memory" screen.

This all seems to have started after I installed a medical program, which I have since deleted. I have also installed blackberry app world, and it is still installed.
My file free space is: 16569897 bytes
I do have facebook installed and updated, even though I've uninstalled it and it didn't seem to help any.

I've tried to do the application launcher to see which apps are running, but I hold down alt and hit the backspace button and it does nothing.

I've done the battery pull about 100 times in the past few days as that seems to be the only way to even do the simplest things such as making a phone call.

Should I just reset my blackberry back to its original settings and start over? If so, what is the best way to save all of my phone numbers?

Thank you for any help. This is so frustrating and I'm ready to get it fixed.

Do you have a lot of email, pictures, music, and/or ringtones stored on the device itself?

Maybe try Options > Advanced Options > Applications > Menu key >Modules. See if there are any Facebook modules left behind or modules from other programs you've deleted.

What third party apps do you have installed?

If you hold down alt and hit the backspace button and nothing happens, then the OS on your BB has problem.
Have you upgraded/downgraded your BB OS?