Agent Brains: Y2K: Millennium Bugged

It's New Year's Eve 1999 and The Agency have enrolled you for a top secret spy mission! At midnight the world will be struck down by the dreaded Millennium Bug, all systems operated by computer will be affected and millions of lives will be in jeopardy, to prevent this disaster of catastrophic proportions an essential computer ‘patch’ must be uploaded to the Government’s mainframe before midnight.  The patch has been stolen by the evil Dr NoGood and he has it hidden in the private study of his mansion, demanding 10 billion dollars in ransom for it. You must sneak into his private study undetected, steal the floppy disc and upload the file before it’s too late!  Can you save the 90's to save the world?