An Error Starting Microsoft Excel

Hi everyone,
I am working in a law firm at the accounting department. I am working on a billing for clients. I will bill our clients for our lawyers appearance fees in court. When I was about to render the report to Excel, I met this error that TurboLaw cannot open or run Microsoft Excel.

Error Starting Microsoft Excel
TurboLaw could not start Microsoft Excel to display your document. The error was: Retrieving the COM class factory for component with CLSID {00024500-0000-0000-C000-000000000046} failed due to the following error: 80040154.
On my analysis of the error, there is a problem with my Excel. So I removed Excel and re-installed it again. I restarted my computer and do my TurboLaw again, and same error again popped up on my screen when I was on the same process.
Please help me solve this issue with TurboLaw's collaboration with Excel.
Thanks.
