When buying a franchise, you should beware of "freedom of contract". Freedom of contract is a bedrock concept of the legal system. It presumes that every person understands every word of every contract and that their "self-interest" will cause them to not sign unfair or ill-advised contracts.
If you follow best practices as a franchisee, you will never use the computer for personal matters. It is tempting and far more convenient, but extremely dangerous. Most franchise agreements give the franchisor "unfettered" access to your computer and all information on it. If you email your sister complaining about how the franchisor treated you, the franchisor has the right to read it, and you should assume they will.