Hi Rick,
I've had similar issue with other IDE's when either the IDE or workspace or source code are in the C:\Program Files path on Windows 7 machines.
The path adds extra permissions that the IDE doesn't know about so after initial access to file you cannot delete or update.
This might not be your issue but wanted to share.
My solution was to uninstall and re-install to non-Program Files path.
Regards,
David