How To Reinstall Microsoft Office Accounting 2009 Pro

If, like me, you use Microsoft Office Business Accounting 2009 then you may find this article very useful.

As you probably know Microsoft terminated support for this product in 2009/10. This is a great pity as I think it is a superb application and provides what I need to run my business, both from an accounting view-point and  stock control and analysis.

Recently I upgraded my Windows 7 64bit PC and had to re-install.

As it was not straight forward I have documented it here for others…

  1. Install the free to use version of MS Office Accounting 2009 Pro using the default key provided (available here )
    You will be at version v.0.3610.0
  2. Download and install Service Pack 2 (available here )
  3. Open OA2009 and select to open a Sample Company (for now)
  4. You will be prompted to go through a setup and upgrade process
  5. Once the update process has finished restart OA2009
  6. You will be asked if you wish to upgrade to the full Office Accounting 2009 Professional version. You need your original license key for this without it you cannot continue.
    If you no longer have your license key then you may be able to get Mamut to request it from Microsoft which is how I got mine. Mamut can be contacted via their website
  7. When prompted – Enter your product key
  8. When the upgrade check your version. You should be running Pro at v4.0.33180
  9. Next run Windows Update until all updates are completed (you may need to run and reboot a few times). When all updates are done you should now be on v4.0.3610, the final version of MS OA2009 Pro.

    Note: I subsequently noticed that you can download Service Pack 3 from
    I haven’t tried it but I’m pretty sure that you could run this instead of relying on the Windows Update process to get to v4.0.3610

  10. Now that you have an up to date version you should be able to import your data backup of your original accounting data.

Hope this helps some of you looking for this info.


Taff Lovesey (fantasy author site)

About taffybach

Author of the young adult fantasy novel series, The Portal Chronicles, including The Spider Gem and The Shimmering Gate. When not writing and promoting Taff runs a small IT support company, LITES PC based in Bourne UK.
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5 Responses to How To Reinstall Microsoft Office Accounting 2009 Pro

  1. Blanche says:

    Thanks for finally writing about >How To Reinstall Microsoft Office Accounting
    2009 Pro | LITES PC <Loved it!

  2. Alta says:

    Woah! I’m really loving the template/theme of this site. It’s simple, yet
    effective. A lot of times it’s difficult to get that “perfect balance” between user friendliness and visual appeal. I must say you have done a very good job with this. Also, the blog loads very quick for me on Opera. Superb Blog!

  3. conference venue matters says:

    I like it when folks get together and share ideas.
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  4. Ray says:

    um, dude… this was brilliant. Thank a million!

    – Ray

  5. Nigel says:

    Thank you so, so, so much for this post. You just saved me from losing FOUR YEARS worth of accounts information!!

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