Error writing to file when installing software

I am trying to install Macrium reflect. It gets part way through the install process before an error dialog pops up

Installer Information
Error writing to file: C:\Program Files\Macrium|Reflect\Reflect.exe

I have tried running the installer as Administrator
I have tried going to C: drive security and giving myself full access to eveything
I have tried to access the Administrator account by going to a command prompt and typing net user administrator /active:yes . I get System Error 5 Access denied

None of these things work

As a side note, I have had a gutsful of Windows 10 always asking me for Admin permissions to do routine stuff like installing software and running exe files. I installed this OS on MY computer, so I ought to have unlimited and unrestricted Administrator access to do anything I like. Why is this not happening?

NOTE: My account information says "Local Account Administrator". Go figure!!

Giving your self full rights won't help as it's an install so it's running as a system install and it's system not you that needs rights. Have you checked the drive for errors as that would also give the error if there is a. Fault

Samuria said:

Giving your self full rights won't help as it's an install so it's running as a system install and it's system not you that needs rights. Have you checked the drive for errors as that would also give the error if there is a. Fault

OK, I tried installing Macrium in Drive D: (a separate physical HDD). That worked fine

I uninstalled it, and ran CHKDSK C:. No errors were found

I tried reinstalling in Drive C:\Program Files\Macrium\Reflect- failed with the same error.

Then I tried installing it in C:\Macrium\Reflect - and it worked

It seems I cannot install programs in the Program Files folder