Hi
can you scan with antivirus first. then download office 2003. some appication running back off your windows 7 which eat all processes and some malware is in ur pc. download malwarebytes and scan it and then download office 2003. Office
2003 is compatible with windows 7 anyway.
thanks
Naeem Bhatti MCITP EA, MCITP, MCTS Exchange 2007 MCSE security,MCSE AD, MCSE in Messaging, MCDST SBS2003 and SBS2008 Specialist