Download the Microsoft .NET Framework 2.0 SDK (64-bit version) from the Microsoft website.
Install the SDK on a 64-bit machine where you want to run Veeam FastSCP.
Open the command prompt (go to Start > Run, type "cmd" and press Enter).
IMPORTANT: You must run cmd as Administrator.
Change the directory to: C:\Program Files\Microsoft.NET\SDK\v2.0 64bit\Bin.
Run the following command:
corflags "C:\Program Files (x86)\Veeam\Veeam Backup and FastSCP\VeeamShell.exe" /32BIT+
Run Veeam FastSCP again.