I use a Linux server to manage my home network, it's a combination SAN, bittorrent, x2go, backup box.
I keep all my installers on this and share them out to my Windows computers using Samba. For the past year, I've been having trouble installing items, I have the share open to internal PC's, but when I try to run as admin, the permissions fail. I assumed this was some sort of Windows update issue, but come to find out, it's Samba.
Add this line to your /etc/samba/smb.conf file, in the [global] section:
acl allow execute always = True
This will fix the issue and allow you to access files under your admin account.