The Dell laptop win8 is installed with autorun and runs the win8 castrated version. This product (14TR-3728) cannot be started. Start with a win8 USB flash drive, saying that the disk is locked. Then DISKPARTDISKPART> list diskDISKPART> select disk = 0 DISKPART> list volumeDISKPART> select volume = 1 DISKPART> attributes volume clear readonlyDISKPART> clean finds that the win8 castrated version is still unavailable, windows 7 can be installed. A lot of terms can be found: UEFI, GPT, and Secure BOOT. Day, it is hard to solve the problem of installing XP in sandy bridge. The term Nima came out. After installing Windows 7, you can try again to see if you can reinstall the castrated version win8. network reference link: 14RT simple, no disk, lossless GPT conversion, and quick UEFI Installation http://www.bkjia.com/os/201307/225797.html There are only two methods for starting the 5.4 progress: 1. The complete recovery process of Legacy BIOS + MBR 2 and UEFI + GPT is as follows: 1. Prepare a 4 gb u disk, format it as a FAT32 file system. 2. Download Win8, named Windows_8_Chinese_Language_Edition_64bit (CCS). iso, decompress the package, and copy it to the USB flash drive. 3. Set the USB flash drive startup Item in BIOS. Secure Boot ==> EnabledBoot List Option ==> UEFI next click Add Boot Option. Boot Option Name Bar ===, you can Name it yourself, for example, USB_X64. The Tab key switches the focus of the operation interface. In the File System List column, you can use the Up and Down arrow keys to select entries. USB refers to a USB flash disk, and HDD is a disk. For the first installation, You need to select a USB flash drive. After restart, You need to select a hard disk. Tab to File Name, press "Enter", and select an efi extension File bootmgr. efi. If not, select bootx64.efi under efi \ boot (both options are acceptable ). Switch the Tab key to yes and click. In the BIOS interface, use F5 and F6 to adjust the startup sequence list. In this step, select USB_X64. 4. Save the settings. The computer starts automatically and enters the installation interface. 5. If the disk is partitioned by MBR, you can delete it all after the backup is completed. In this step, I convert the disk into a GPT partition. You can use shift + f10 to call up the command line and then diskpart --> list disk to check whether the GPT is correct or the disk is not automatically converted to GPT. For manual instructions, refer http://www.bkjia.com/os/201307/225796.html Diskpart -- enter disk management command list disk -- list disks owned by the system select disk 0 -- select disk 0 (determine your target disk based on the disk size) clean -- clear the disk convert gpt -- convert the disk to the GPT format list partition -- list the partitions on the disk, because we just converted it to the GPT format. Therefore, the partition is empty. create partition efi size = 200 -- create an EFI partition. The size is 200 M create partition msr size = 128 -- create an MSR partition. If Microsoft creates a partition by default, the size is 128 M create partition primary size = 307200 -- create a primary partition with a size of 300 GB. The partition is adjusted as needed to install win8. List partition -- list partitions on a disk select partition 3 -- move the focus to the first primary partition, GUID = 3 format fs = Ntfs quick -- quickly format the partition to Ntfs exit -- exit diskpart exit -- close command line and click Refresh on the disk interface. 6. the installer automatically performs the following operations. A message may be displayed in the middle of the page indicating that the disk settings cannot be installed on the cloud. 7. Restart the disk again, and set the boot sequence in BIOS to hard disk priority. 8. completion.