Mac Virtual machine parallels cannot start a "Windows 7" virtual machine

Before shutdown on the virtual machine installed a game a bit large, the next day on the use of virtual machine can not be used;

Tip: Mac Virtual machine parallels cannot start a "Windows 7" virtual machine. Release the "Windows 7" virtual machine stored on a physical hard disk at least 241 MB, and then try again;

Solutions for the official website: http://kb.parallels.com/cn/10117

The simple thing to say is that the memory used is too big to clean up the Mac's physical hard disk, such as dumping the trash to free more space, you can restart. That's how I solve it.