how to reinstall MS Office Professional 2003 without a CD

That is a problem!

MS no longer provides support for 2003, so they don't provide downloads. You will have to find someone who has the disk and borrow it, or have them copy the files to USB and give it to you.

Here are some ideas of places you can look

I Need Installation files/CD for an earlier version of Office, What Can I Do?

Before you go looking for the installation file you need to be clear on the name of the Office bundle you are looking for. Office Product Keys are bundle specific, so getting the wrong installation file will do you no good. Wikipedia is a good source:

• https://en.wikipedia.org/wiki/Microsoft_Office_2003- wiki 2003 wiki
• https://en.wikipedia.org/wiki/Microsoft_Office_2007wiki 2007 wiki
• https://en.wikipedia.org/wiki/Microsoft_Office_2010 wiki 2010 wiki

Once you get the installation file, make sure you burn a copy for yourself before returning the disk if it is borrowed.

1. 1.    Find a friend (new or old) who has the right CD and is willing to lend you the CD. Unlike the very “old” DOS days when there was a signature file on the floppy, there is nothing unique on the CD to identify it. The uniqueness is provided via the Product key you use to activate it. So, you can borrow a CD without threatening their installation/activation.
2. 2.    Ask at work if they have an installation CD you can borrow. There are often old disks “hiding” in dark corners of storage rooms
3. 3.    Try to find a local “PC Computer Club”. There is almost certainly a geek or three with disks you could borrow.
4. 4.    Find a small local computer store or repair business. They often have new unsold copies of “old” versions of software because they are still supporting customers using them.
5. 5.    At the small repair business they may have old computers that customers had upgraded from that you could now use (buy and transfer to your machine)
6. 6.    You could buy it “new” online from a reputable online store. Be very careful who you give your money to
7. 7.    Try websites like Kijiji or Craig’s List to see if you can borrow or buy it from an individual
8. http://support.microsoft.com/kb/326246/
9. http://support.microsoft.com/kb/302822

10.  Replacement CD - http://answers.microsoft.com/en-us/windows/forum/windows\_7-windows\_install/replacement-cd/fb8230d4-000f-4ee7-b732-c9f8fff28bfd 

12. 

Please let us know what worked.

Jim

Have you tried a repair>Control panel>Add or Remove Programs>Right click on Office 2003>Choose repair. Only problem is that it may ask you to insert disk.  But most of the time it just reinstalls Office 2003.

PS: you can also run 'detect and repair' from an open program, e.g. Word>Click on Help>Choose 'Detect and repair'