Original sentence: It should be noted that if a user is a member of the Power Users group, he or she is able to promote their account to an Administrator with little effort.Thus, the Power Users group should be used with trustworthy users only; it is not suitable to contain untrustworthy users
Edited sentence: It should be noted that if a user is a member of the Power Users group, he or she has greater chance of exposing the system to malware over a normal user and is able to promote their account to an Administrator by purposely installing malware.Thus, the Power Users group should be used with trustworthy and knowledgeable users only; it is not suitable to contain untrustworthy users