Unable to install Lacerte

Robert, please understand that you are asking the peanut gallery. If you want a really deep discussion, spend hours on the phone with support.

The first link has a yellow bright idea banner that states "If you are the owner of the firm, manage your office, or are the only Lacerte user in your office, you must: complete the initial setup, and invite additional software users (if applicable)."

I think the simple answer to your question is because you would like to use the program and that is a hurdle you must clear to do so. 

"and accepted it in your email"

@RFGEA 

It's Your Email and not Ours. This is Not customer support or tech support. This is Peer Users on the internet forum.

I recommend you remove that account # you keep posting.

"Please explain to me why I need administrative approval, when I own the company and I am only one that works with the programs."

Being "administrator" of a product you bought and own is a typical requirement for something that must comply with privacy and authentication requirements, such as "invite other users in your firm."

Installing software as "run as Administrator" on your computer has to do with how the permissions are elevated, such as, being able to Update that program later, having read/write access to all folders required, and to be able to send/receive over your internet connection. Most people do not know how to fire up a new Windows OS computer so that they are working as Admin in reality. The true Admin account is a hidden account.

Remember when you used to get UAC pop ups frequently? User Access Control "this program wants to make changes to this computer...will you allow this?"