I run Win 7 Home Premium with UAC on. I have no issues with Aero Peek working. I have Object Dock 2 Plus ver 2.10.0.811
Autorun on Windows startup works here also.
Some issues to check:
1. are you logging in your machine as an administrator account?
2. are you using default settings for UAC?
3. do you use Tweak7? It will give you easy control of UAC settings. Tweak7
4. what security setting are you using for when a program requests elevation?
UAC is a valid security feature of Windows imho. I am okay with using it and always have it on.