I also assumed I was Admin ,as I was the only user but some actions seem to not aknowledge this .
I did the following and now I never get asked for permissions.
turn off uac.
then 1- Click Start, and type "secpol.msc" in the search area and click Enter. (You may receive a prompt from UAC, approve/login and proceed)
2- In the left list, choose "Local Policies", then "Security Options"
3- Set "Accounts: Administrator account status" to Enabled.
4- Set "User Account Control: Admin Approval Mode for the Built-in Administrator account" to Disabled.
this is for Vista originally but I have used it in WIN7 also.