“Debug certificate expired” Error in Eclipse

When there is no error in the code, but for some reason the project says there is an error and prevents you from running...

When you've torn your hair out trying to delete and re-import your project files to no avail...

When you've "cleaned" and "fixed project properties" so many times your index fingertip is bleeding...

Try looking at your project problems ( Window > Show View > Problems )

You might get something that looks like this:
Debug Certificate Expired...

If the above has happened to you, then I have a fix for you! You can probably solve this problem by deleting the debug certificate file. (Eclipse will then build a new one, and the error will go away.)

Win 7 OS: Go to ( Window > Preferences > Android > Build ) and find out where the debug.keystore file is located on your hard drive. Then using file explorer, find it and destroy it.

Thats it. Import your projects or whatever, do a clean and the error should disappear.

References:
http://stackoverflow.com/questions/2194808/debug-certificate-expired-error-in-eclipse-android-plugins