Excel is not installed, cannot produce spreadsheet

Hi,
As the year started, there is a lot of implementation our company is doing.
One of this is our application was shifted to SAP, we have there a function that will import report to Microsoft Excel.
When I am about to export a report an error message appeared, it tells me that Excel is not installed on my computer.

Excel is not installed, cannot produce spreadsheet
As I analyze the error it's pointing out that I don't have any Excel installed in my compute.
As I look into my installed application there is Excel installed in my computer.
So I am wondering why my other office mate can do with the export data. It's only me who cannot do it.
Please share some ideas on my problem.
