一种可以穿透还原卡和还原软件的代码（A code that can pass through a restore card and restore software）.docVIP

一种可以穿透还原卡和还原软件的代码（A code that can pass through a restore card and restore software） A code that can pass through a restore card and restore software Restore card and restore software are widely used in various public occasions such as computer rooms and Internet cafes. The restoring card and software (hereinafter referred to as virtual I restore technology) can record all of the hard disk write operation, whether you on the hard disk copy or delete mobile and even format the partition operation, as long as a restart, everything will be restored to the operation before, so some manufacturers will restore the virtual in the ad added can prevent all computer virus. This method of virtual restore can really protect the computer in public computer rooms for most of the time. Isnt there really a way to penetrate this protection mechanism? The answer is no, please allow me to say. First, the principle of virtual reduction technology What this article says is a kind of commonly used in the reduction card or the restoration software technology, certainly, the different brand, the different manufacturer production may not be the same, but the principle is interlinked. First of all, restoring card and software will be the first to seize the right guidance, the original 0 head 0 fan 1 is stored in a other sectors (specific to the backup sector is not certain), their code is written into the first 0 0 1 fan, which can be implemented in the right operating system before. This is similar to a boot virus; then, we look at the virtual reduction technology in the operating system what was previously done: 1. save the entry address of the INT13H in the interrupt vector table; 2. for yourself instead of the INT13H code is written into memory, and remember the entrance address, of course this write memory is not an ordinary write, but we have a method called resident, the realization method about resident program we dont spend another space to describe, if you dont know then please find