In order for you to play Clicker Heroes on Windows with minimal graphics settings, your computer must meet the following requirements
OS *:
Microsoft® Windows Server 2008, Windows 7, or Windows 8 Classic
Processor (CPU):
2.33GHz or faster x86-compatible processor, or Intel Atom™ 1.6GHz or faster processor for netbook class devices
Memory (RAM):
512 MB RAM
Storage:
90 MB available space