A old MacBook was given to me to develop an iPhone app. The problem is that the Mac was treated horribly and there is a lot of bloatware. It is currently running 10.7.5. I want to create a new user that does not use ANY of the applications so it runs completely separate as in none of the bloatware apps are shown/used. I can't restore the Mac completely as it's someone elses and I don't want to remove any of their files but still want to have a "restored account."
You could make a new account, with Parental Controls setting. Use the Parental Controls to only allow specific applications to run. System-level programs (like anti-virus, or others) would still be running in the background; but, as far as normal applications go, you would know exactly what was being run and when.