What you need to run OAK

OAK will run under

Windows XP
Windows Vista
Windows 7

The operating system needs to have the following components installed:

version 2.0 of Microsoft's .NET framework
Excel 2007 Primary Interop Assemblies (PIAs)

Microsoft Office patch KB907417 may be required for Excel 2003.

.NET 2.0 is installed by default with Windows Vista and 7, and is added to Windows XP by various service packs.

The PIAs are installed along with the relevant version of MS Office, unless:

the .NET Framework 1.1 or later was not present when Office was installed.

OR

the .NET programmability option was specifically disabled in a customized installation.

No PIAs are required for Excel 2000 or 2002/XP.  OAK interacts with those versions of Excel using a different mechanism.

OAK will run under

Excel 2000
Excel XP (effectively 2002)
Excel 2003
Excel 2007

Though there is a version of Excel for the Apple Macintosh, OAK is not designed to work with it.

See also

If you are using Excel 2003, it may need updating.