Veeam FastSCP is a stripped down version of Veeam's Backup and Replication for VMWARE. What is cool about both products is that you can Secure Copy between servers/folders. You can add Linux Servers to it and if you are using the Paid version, it does not count against licenses since the licenses are for VMWARE ESX and ESXi hosts.
I use the Free Version to copy files from my computers to and from VMWARE Hosts which is a real good thing if you ever tried moving files from your Windows Machine to the Storage of a VMWARE server without it.
Any ways, I have seen this now a couple of times and it only happens in Vista and Windows 7. When you are installing it, it will ask you for an account to start up the service, but when you give it an account, it will error out. It complains about the password and or account (sorry I did not get the error copied).
All you have to do is start the installation with administrator privileges. Right click on installer and "run as administrator" --- that is all.
Do not use an administrator account though. Create just a plain old account since all it needs it for is to start the service.