The usuals:
1. Manually. Details are different, of course, for each program, but you might be able to find removal instructions via Google if you know the name of the program.
2. With an antivirusprogram (like Norton, Kaspersky, AVG and others)
3. With antimalware programs (like MBAM)
4. By using System Restore back to before you installed it
5. By going back to an image of your system without it
6. By going back to factory conditions or doing a clean reinstall of Windows 7
How do I remove ransomware from my computer?

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