Microsoft Virtual PC offers us the possibility of counting with several operative systems on the small PC and, even if it sounds like something difficult, you will see how simple this is for the program.
You will have each operative system in different windows, so you just need a click to have access to one or the other.
Inn this way you will be sure when you execute a suspicious program, you may execute applications which are not admitted in your OS or just try another OS even if you do not change the PC or if you format the one you have.