Help with Avast Antivirus Virus chest?

Avast found some viruses and now their in the virus chest and I don't know if I should delete them because I don't know if their going to delete some of my pc's information with them because some of the viruses are in my administrator files.

PLEASE HELP ME!

Help with Avast Antivirus Virus chest?antivirus software

VIRUS REMOVAL PROCESS:

do this OFFLINE

trash likes to hide in your restore system,so every time you clean up your computer and you use system restore,it restores the trash along with everything else !

turn off system restore:

XP:

start--all programs--accessories--system tools--system restore

check the off box

Vista:

right click computer icon

select properties

select system protection

uncheck os ( c: ) ( system )

alerter %26 messenger services:

stop messenger spam !!

XP only:

all programs--administrative tools--services

all services are in alphabetical order,right click both alerter %26 messenger services--select properties--from drop down menu,select disable

Active X:

XP ONLY

internet explorer--tools--internet options--security--advanced

uncheck download unsigned--unsafe--autoprompt

CLEAN UP:

delete history:

XP %26 Vista:

internet explorer--tools--internet options--general: