If the error message is controls are not registered, then that is the problem.
Registered means there are entries in the Windows registry, either a software installer program does that, or one must do it manually using the regsvr32 utility...but you need to know the precise name/location/version of the missing DLL.
Remember that some controls work better with one web browser vs. another...what web browser are you using?
If you're asking for technical help, please be sure to include all your system info, including operating system, model number, and any other specifics related to the problem. Also please exercise your best judgment when posting in the forums--revealing personal information such as your e-mail address, telephone number, and address is not recommended.
Regarding powerpoint presentations