There are more and more people using Win7 systems, but the system also has compatibility issues and security risks of system crashes. Create a three-system solution that can solve the problem. The system home tells you how to install Win7+XP+ModeylmfOS three systems. I believe that everyone has heard such a dual system, three systems and so on! But presumably everyone knows that many dual systems often crash one system and the other system is bad! For the sake of compatibility with old software and system security, the author adopted the installation system of "three systems", which is the three systems of Windows7+XP Mode+ylmfOS. Some people may say that this will be more complicated and take up a lot of disk space! You can rest assured that all the installation process can be done under the Windows7 system, just like installing your own application software, very convenient! As for disk usage, it is worthwhile to sacrifice some space for compatibility and security compared to the current large TB hard disk. First, install XP Mode to solve Windows7 compatibility problems Using Windows7 is of course the current mainstream, but hate is that there are always a few software and Windows7 is not compatible, especially with 64-bit Windows7! The compatibility assistant that comes with Windows 7 is very good, and the incompatible software is still incompatible, and there is no practical solution. Microsoft's XPmode can solve almost all compatibility issues! Installing XPmode is equivalent to installing a separate XP system! 1. Check if the computer can install XP Mode. We need to download a SecurAble software to check if our computer can install XP Mode, download the address http://xiazai.zol.com.cn/detail/39/380859.shtml, after opening the software, we need to check Hardware Virtualization Option. The test results are as follows (Figure 1): NO: CPU does not support. More sad. Yes: CPU support. Hurry up and set the VT switch in the BIOS to Enabled. Locked ON: The CPU supports it and the BIOS has turned it on. Congratulations! Now you can play XP mode. Locked OFF: The BIOS currently disables virtualization technology, but is not sure if the CPU itself supports it. In this case, first look for the Virtualization Technology in the BIOS, set it to Enabled, and then re-test, if the results have not changed, it is more sad … … 2. Install Windows Virtual PC. This is the premise of installing XP Mode. In fact, it is a patch of Microsoft KB958559. If you have already installed it, you can skip this step. It is worth noting that you want to download the version. X64 refers to the 64-bit system, and X86 refers to 32. Bit system. Download http://www.microsoft.com/downloads/en-us/details.aspx?familyid=2b6d5c18-1441-47ea-8309-2545b08e11dd&displaylang=zh-cn###3. Install XP Mode. For those who have passed the test and are able to install, start acting! Download Chinese XP Mode Address: http://download.microsoft.com/download/D/7/A/D7AD3FF8-2618-4C10-9398-2810DDE730F7/WindowsXPMode_zh-cn.exe The installation process has been clicked "Next" & rdquo; can! This is installed on the C drive, so you can back it up when you back up. 4. Configure the virtual machine environment. When you first open it, under Windows7, click Start → All Programs & Rarr; Windows Virtual PC & Rar; Windows XP Mode, you can open XP Mode. The installer will then automatically set up and set up the virtual XP system environment. The installation and setup process takes about 5 to 10 minutes depending on the configuration of the user's computer. However, the installation program will show the user a simple XP Mode teaching in the process, so that the user can quickly get started, and it does not feel boring. 5. Enter the official XP Mode (Figure 2). 6. Configure XP Mode. The default setting only gives us less than 1GB of memory in XP Mode. We can increase the memory for it. In XP Mode, click Ctrl+Alt+Del in the upper right corner to pop up an interface (Figure 3), click “Shutdown” Then, under Windows7, click “Start → All Programs → Windows Virtual PC→ Windows Virtual PC”, then right-click and select “Set" to open the settings interface (Figure 4). Why do you want to open this way? Because if you don't, close XP Mode first, you can't enter the settings. Here, you can configure the system's memory, network card and many other things. Combine your own computer configuration settings! In the future, there will be any incompatible software installed and running under this system! The compatibility problem is basically solved, and the opening speed of this system is very fast, unlike the XP installed independently. After all, our main force in the future is Windows7! Second, the installation of ylmfOS to solve the security and repair problems ylmfOS, is the rainforest woodwind based on Linux developed an interface similar to XP operating system. For friends who are familiar with XP users, it is easy to get started. As you know, Linux is very secure and there are important tasks that can be done under this system. Even more gratifying is that the Windows system does not recognize Linux disks, but Linux can recognize Windows disks, so if the Windows 7 system is broken, it can be fixed under this system. So you can create a powerful "three systems" computer! 1. Download and install ylmfOS. Download the address http://www.ylmf.net/ylmf/news/2011053125784.html. In fact, installing this system is simpler than installing XP Mode. After the virtual image is loaded, after clicking the installer, we choose “Install in Windows”, this time it is best to install it on a non-system disk, and later restore the Windows system. It can be run independently (Figure 5). 2. After setting, click “Install” to automatically exit Windows7 system and install it automatically under DOS. After the installation is completed, it will have a system startup item when the computer is turned on. Go and see it, it is similar to XP. Let's go! This system kernel is not Windows, it is Linux. This system itself integrates many commonly used application software, such as browser, IM software, you can also go to Linux Software Park to download more software installation, let's experience it! It is competent for general Windows operation and has excellent security (Figure 6). At this point, "three systems" is installed. It should be noted that the ylmfOS is best not to be installed in the C drive, so that he is relatively independent, better to maintain our system, you can also experience the computer operating system of different kernels. This article comes from [System Home] www.xp85.com