To stop UAC:
# Click Start and then open Control Panel.
# In the Control Panel, click User Accounts and Family Safety.
# Click User Accounts.
# Click Turn User Account Control on or off.
#Clear the tick or check mark on the box beside the Use User Account Control (UAC) to help protect your computer option.
# Click OK.
# When prompted, restart the computer. Note that the changes will affect all users on the computer.
Note: To enable the UAC, simply tick or select the checkbox again.
To get rid of the red sheild:
Control Panel > Classic View > Security Center) and click 'Change
the way Security Center......' then choose 'Don't notify me and
don't........'.