Hello,
The best and safest thing to do is not to disable UAC entirely, but to disable the elevation prompts using the freeware program
TweakUAC. In doing so, you'll still benefit from certain features of UAC such as Internet Explorer operating in protected mode and programs not running with administrative privileges by default.
TweakUAC is a free standalone program which doesn't run in the background. Simply run it and select from three options: Turn UAC off, Switch UAC to quiet mode and Turn UAC on. Switching UAC to quiet mode will leave UAC on, but disable the annoying elevation prompts.