Please i need a product key for microsoft office (excel) 2007 !!! my assignment is due tomorrow morning and my trial JUST ran out!! :(

Just change the system date and time in BIOS and then reinstall the office and you will be able to run it. This way you can run your office for ages by just bringing your date and time to previous instance.

Or just restore your system to the date you installed office on your system.

Thanks.