Explain the risk factors involved in affecting a software product?

Firstly do you need to software program. Buying software is one thing but can you use the software for more than filling up space on a hard disk. Any new software will take time for you to learn how to use the program to its best advantage. Then there is the problem of software obtained from a friend rather than bought from the developer. If you want to get 'free' software then you run the risk of getting problems not software which will not be supported by the people who wrote the software in the first place