Did you read the required specs beforehand? When running any of the Adobe products, it's important to know that they use a lot of resources. So, if you don't have the specs, you'll probably have to run an earlier version of the software which normally require less or upgrade your computer. Either way, it will have some kind of cost.
It also depends on if you can find a software that is open source that does the same thing without you having to spend a dime. What do you need it for?