Open the Settings app on your watch. Tap on the top item, Time. Tap on the button in the middle of the screen. Turn the Digital Crown to adjust the time; tap Set when done.
Windows Vista does not have sufficient protection on it's own. Avast is legit, and it runs on the background, because it's protecting your system all the time. Run an updated full scan with: Malwarebytes and Spybot Search & Destroy Therafter check through with your anti virus, just to ensure it still works.
Avast SecureLine is a program developed by AVAST Software. The most used version is 1.0.239.2, with over 98% of all installations currently using this version. During setup, the program registers itself to launch on boot through a Windows Schedule Task in order to automatically start-up.