说明：   Monkey，即猴子病毒传播硬盘和软盘的引导区，总长度为 01F4H（500字节），它将原引导记录加密后保存，在系统读出时先解密再送出，结果造成病毒不在内存中时，系统无法得到正常的引导记录，以至对所有硬盘分区无法访问。
(Monkey, a monkey virus that is spread by floppy disk and guide, 01F4H total length (500 bytes), which will encrypt the original boot record keeping, the system read out the first declassified again send, resulting virus is not memory, the system can not be normal boot record, as well as to all disk partitions can not visit.)