Good day, I think I might be having a similar issue. I posted here:
http://forum.lansweeper.com/yaf_postst567_Logon-failure-error-during-installation.aspxI followed the directions for editing the SQL settings prior to installation but during the install it still will not accept any username and password for installing the service.
I downloaded the latest installer but it still will not work. I can get the Database and Website to install flawlessly but not the service.
Of note, I am running VMWare on this server but I'm attempting to install on the host, not on a virtual server. Also, I was previously running Spiceworks (craaaaaaap) but completely uninstalled it a few weeks ago.
And yes, I do believe that I am using the correct domain\username syntax.
Thx!