Win7/win8 dual system 2 things you must pay attention to before uninstalling win8 system

            
1, to understand the dual system startup principle
1) First, we must understand how the operating system is booted, and then the Win8 system boot file is first removed, after the computer is turned on, the system enters the self-test, the computer will be based on Start by setting the startup sequence;
2) First boot the BIOS, read the master boot record into the memory after the BIOS starts, and give control to the master boot file, then read the partition boot record, start the manager File, if the waiting time of the dual system in the computer is not 0, the boot manager interface will be displayed, then you can select the system you want to enter;
3) In order to uninstall Win8 operating system, you need to clear the boot file first. In the record of the Win8 system, the Win8 operating system cannot be run, and the Win8 system can be successfully uninstalled afterwards, that is, the boot record of the Win8 operating system needs to be modified in advance.
2, retain the required data
If you install all the software on the non-system disk in the process of using the computer, this need to retain a small amount of data, usually need to retain the data as email data, fonts Important records of chat tools such as browser favorites, QQ, etc., and important folders stored in the system disk.