Install Windows and Ubuntu systems independently

When installing Windows and Ubuntu systems in a completely independent way, many people prefer to install Windows first, then install Ubuntu and use the grub that comes with ubuntu for guidance, if you reinstall windows, ubuntu cannot be started. It takes a long time to repair the problem. Today, we recommend you to install the system independently. No matter which system you reinstall, it will not affect the other system. There is a requirement that the windows version is higher than xp and does not support xp. Step 1 of www.2cto.com: Install windows. Step 2: Install liveusb-creator and create a USB flash drive for ubuntu. Step 3: Insert a USB flash drive to install ubuntu. Step 4: add the ubuntu startup item in the windows Startup manager. It can be roughly divided into four steps. It seems that everyone installs it like this. The following uses my own installation method as an example to describe in detail. Step 1 install windows and leave a blank disk of about 30 GB. (Size is set according to your preferences. ps: the number of Primary partitions cannot be 4 in the partition; otherwise, linux cannot be installed.) for the second step, refer http://www.ubuntuhome.com/liveusb-creator-v3-11-7-releases.html , Note that it must be installed on the C drive. If it is not installed on the C drive, there may be problems. I have tried this software many times, except archlinux. Step 3 install linux. The key is to install grub into the linux partition. Ubuntu versions: http://www.ubuntuhome.com/ubuntu-download Www.2cto.com is more advanced here. You can also click "Restore" to recover from careful operations, so you don't need to worry about anything. Taking my example, I only divided two zones for ubuntu, one root partition (/dev/sda6) and one swap partition (/dev/sda7 ), these two partitions are required for linux installation. The following is a "device for installing the boot loader". Select the linux Root partition or boot partition (if you have a boot partition ). Next, install the SDK. After the installation is complete, restart the system. At this time, there is no difference with the installation of ubuntu. You can directly access your windows system. We need to add the ubuntu startup item in the windows Startup manager. Step 4 of www.2cto.com: Download The easybcd software. Click "1" and select "grub 2" in "2". Enter a name you like and click "3. OK. Restart windows. In this case, you will find one more entry in the windows Startup Manager (name entered in "2"), and press Enter, this enters the grub startup manager we are familiar. Grub is installed in ubuntu. If a problem occurs in windows, you can only use easybcd to add the startup Item. If you want to upgrade ubuntu, it is disgusting. grub will be written into mbr. If you want to upgrade ubuntu, you must reinstall it. I once upgraded ubuntu from one version to another, and found that the upgrade is different from the direct installation, so every time I reinstall the system. From Ubuntu home