I haven't installed the system for a long time. I used to have N notebooks for my classmates in college. Now the notebook is really troublesome to install, especially the pre-installed win8 book, mainly using UEFI, if you don't understand, please google yourself. These two are Lenovo's notebook modifications, in fact, similar to Samsung, but the BIOS settings are not the same, Samsung needs to be like this: Select BOOT option & mdash; Secure Boot is set to "Disabled" Select OS Mode Selection to CSM OS selection Under the Advanced option, Fast Bios Mode is set to “Disabled" After completing this, F10 exits and saves, and then you can boot the installation system from the USB flash drive. Use the floppy disk of the win7 system to burn into the U disk. In this way, after removing all hard disk partitions during the installation process, the system still cannot be installed. At this point, the installer cannot create a new system partition. I went to bios to turn off AHCI and I can install it. In fact, you can first download the AHCI driver, and install the driver to install the system. After the installation is complete, use Samsung's random software SW update to download the driver. Note that there is a problem with the integrated graphics driver of this tool. It is impossible to adjust the screen brightness. Later, I went to Samsung's official website to find a HD4000 core graphics card driver. . After the installation is complete, you can use the second article recommended above to find the pony activation and activate the win7 system. After installing win7, delete a disk directly under win7 to install Ubuntu. Use Ubuntu to boot from the hard drive using easyBCD. Note that the following section title Install Ubuntu root (hd0,0) kernel (hd0,0)/vmlinuz boot=casper iso-scan/filename=/ubuntu-11.10-i386.iso ro quiet splash locale=zh_CN.UTF -8 initrd (hd0,0)/initrd.lz I installed ubuntu-12.04.3-desktop-amd64, and there is a 100M partition in front of my win7, which means that the C drive is not the first one, and at 12.04 There is no vmlinuz file but vmlinuz.efi then it should be written like this: title Install Ubuntu root (hd0,1) kernel (hd0,1)/vmlinuz.efi boot=casper iso-scan/filename=/ubuntu-12.04.3-desktop -amd64.iso ro quiet splash locale=zh_CN.UTF-8 initrd (hd0,1)/initrd.lz Yes, this will start normally, but after starting the installation, there is a problem, Ubuntu does not recognize the installed Win7 system, you can only see one hard disk, if you install it on the entire hard disk, it will definitely go wrong. Please read it carefully. In the terminal, type: [html] cd ~/Desktop && wget 'http://home.comcast.net/~ubuntu_grub/boot_info_script.txt' && sudo bash boot_info_script .txt Get a file and find that there is a problem with the partition table of the hard disk. Windows is installed in the MBR of /dev/sda [html] ====================================== Boot Info Summary: === ========================================== Windows is installed in the MBR of /dev/sda ========= ================== Drive/Partition Info: ============================ == Drive: sda ___________________ _____________________________________________________ Disk /dev/sda: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes /4096 bytes Partition Boot Start End Size Id System /dev/sda1 * 2,048 206,847 204,800 7 HPFS/NTFS /dev/sda2 206,848 125,831,167 125,624,320 7 HPFS/NTFS /dev/sda3 125,831,168 545,261,567 419,430,400 7 HPFS/NTFS /dev/sda4 545,261,568 1,953,521,663 1,408,260,096 f W95 Ext d (LBA) /dev/sda5 545,263,616 964,694,015 419,430,400 7 HPFS/NTFS /dev/sda6 964,696,064 1,384,126,463 419,430,400 7 HPFS/NTFS GUID Partition Table detected, but does not seem to be used. Partition Start End Size System blkid -c /dev/null: ____________________________________________________________ /dev/loop0: LABEL ="Ubuntu 12.04.3 LTS amd64" TYPE="iso9660" /dev/loop1: TYPE="squashfs" /dev/sda1: LABEL="M-gM-3M-;M-gM-;M- ^_M-dM-?M-^]M-gM-^UM-^Y" UUID="90D865D2D865B75E" TYPE="ntfs" /dev/sda2: UUID="8A1C7D091C7CF195" TYPE="ntfs" /Dev/sda3: UUID="F28EE8F38EE8B0F1" TYPE="ntfs" /dev/sda5: LABEL="M-fM-^VM-0M-eM-^JM- M-eM-^MM-7" UUID= "90EEAF7EEEAF5AEC" TYPE="ntfs" /dev/sda6: LABEL="M-fM-^VM-0M-eM-^JM- M-eM-^MM-7" UUID="16DEC808DEC7DDDD" TYPE= "ntfs" =========================== ===== "mount" output: ==================================================================================================== Proc on /proc type proc (rw,noexec,nosuid,nodev) sysfs on /sys type sysfs (rw,noexec,nosuid,nodev) udev on /dev type devtmpfs (rw,mode=0755) devpts on /dev/pts Type devpts (rw, noexec, nosuid, gid=5, mode=0620) tmpfs on /run type tmpfs (rw, noexec, nosuid, size=10%, mode=0755) /dev/sda2 on /isodevice type fuseblk (rw ,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other,blksize=4096) /dev/loop0 on /cdrom type iso9660 (ro,noatime) /dev/loop1 on /rofs type squashfs (ro,noatime) none On /sys/fs/fuse/connections type fusectl (rw) none on /sys/kernel/debug type debugfs (rw) none on /sys/kernel/security type securityfs (rw) tmpfs on /tmp type tmpfs (rw,nosuid ,nodev) none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880) none on /run/shm type tmpfs (rw,nosuid,nodev) gvfs-fuse-daemon on /home/ubuntu/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev,user=ubuntu) ====================================== StdErr Messages: ================ =============== boot_info_script.txt: Line 910: FileArray[$pi]: Bad array subscript win7 is installed on the MBR, and the hard disk has GPT partition table information, According to the above post, clear the GPT signature information. After clearing the signature, immediately look at it without win7. If there is no problem, you can continue to install Ubuntu. Install Ubuntu, pay attention to manual partitioning, write the startup information to the /boot directory, and then use winB to add boot in win7, so you can use Win7 guides Ubuntu, which is convenient for reinstalling the system in the future, and will not affect each other. In short, the system installation is still more than Baidu Google, the problem is normal.