How to registered in this version

Hi
In my code excel ole.db connection string

this is my code

connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + fileLocation + ";Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=2\"";

but i meet this issue this is error

The 'Microsoft.ACE.OLEDB.12.0' provider is not registered on the local machine

I have also installed corresponding provider exe in my pc but this issue not fixed

any one guide me how to fix this?