The way I solved it was to create a new local admin, then I installed the software and then deleted the local admin account after.You then don't get any shortcuts so have to go find the programs in explorer instead!
Just got a LiDE300 scanner for Christmas. Same issue as this with the Administrator account popup.My laptop is on our domain, I am head of IT and our Domain Administrator, with Admin rights on every single machine on our network so this message is a ...