It says that i need to verify the files but i dont know how to fix it

Okay, have you tried running the installer as Administrator?
I deleted my posts because I was confused; I’ve notified @bvijay, FxSound’s lead engineer, he should be with you shortly.
This is an earlier thread where a user experienced, and then solved, the same problem:

However, it appears the Command Prompt has been replaced by PowerShell from Windows 10 onward: