For example Word 2003 saved files with extension .doc, Excel 2003 with .xls and PowerPoint with .ppt. but on the other office 2007 used the new file extensions for its different programs. For example Word 2007 saved files with extension .docx, Excel 2007 with .xlsx and PowerPoint with .pptx. Now the problem is that when you will try to open office 2007 files into office 2003 and you will not open the file due to compatibility issues between both office versions. Microsoft provides a free compatibility pack to convert office 2007 documents to the office 2003 format. There are many third party free converter are available but here we are using Microsoft office compatibility pack.
Follow the given steps to download free Microsoft compatibility pack and install it.
To use this feature, you will need to be logged into your computer with administrative rights.
Visit the following link to download the Microsoft compatibility pack:
When you have downloaded the file, double click on FileFormatConverter.exe file to start the installation.
Now here it’s simply a case of pretending you’ve read the license terms and clicking continue.
Now click on Ok button to complete the installation.
Once the process is done, you can enjoy opening .docx files on Word 2003.