I have face this many times and I want to share the solution of it . Sometimes you have also the same problem i.e asking or prompt for enter the admin password, every time you are going to install anything in your system even if audio and video installer and it's very frustrate.
I am telling you the instruction which will solve your problem.
I am sure after disable the User Access Control (UAC), you won't ask for permission for install the software in the system.
1. Open the User Account Control Settings by clicking the start button
2. Click on Control Panel . You will find a search box on the right top side of the window page.
3. Type uac in the search box as shown in the below picture and it will generate the Action Center page for you.
4. Click on Change User Account Control Settings and it will take you the " Change when to be notified about changes to your computer" page .Now you can see in the below picture it is in the Always notify position and check the status of it (Program try to install software or make changes to my computer needs the admin credentials)
5. You need to make it Never Notify.
Do one of the following:
1) To turn off UAC, move the slider to the Never notify position, and then click OK.
If you're prompted for an administrator password confirmation,
type the password provide confirmation. You will need to restart
your computer for UAC to be turned off.2) To turn on UAC, move the slider to choose when you want to be notified, and then click OK.
If you're prompted for an administrator password confirmation, type the password provide confirmation. 