A while ago, my friend asked me to help downgrade his new ThinkPad e440 Windows 8 to Windows 7 because he was not used to using Windows 7 systems. At the beginning of the rejoined feel this is a simple thing, didn't think behind the successive wall. Finally a variety of information, finally solved, and now the experience and steps to write down to facilitate the exchange of students behind.
BIOS setup: Eufi set to legcal only
Secure boot is set to disable
2. I first format his disk, but when installing Win7, the general prompt cannot be installed on the disk. Looking for a long, finally found the problem: the format of the disk is not correct.
1. Where the problem lies
In the beginning, I used the one-button studio USB PE system, using Diskgenius format disk, formatted disk is GPT format (at this time did not notice the meaning of the GPT representative). Because WIN8 started to support GPT-formatted disks, the installation of Win7 always prompted that it could not be installed. In the same vein, to downgrade Win8 to Win7, convert the disk format to mbr! This is the way Google found it one hours later.
2. Steps to Resolve
The only explanation here is the steps I have to solve.
A. Using the one-click Studio PE system, the win logo = = run =>diskpart. Now jump out of the command window;
B. Enter "DiskPart" and press ENTER to enter the DiskPart partition tool;
C. Enter "list disk" to view each disk;
D. Enter "Select Disk 0" and select the hard disk as the current operation, because the hard disk is typically numbered 0. Of course, if the control of the volume after the disk 0 is not the size of the hard drive, then the capacity of the hard disk is observed in accordance with the disk as the operating disk;
E. Enter "clean" to empty the current disk partition, the effect of which includes merging all partitions and formatting the entire hard disk;
F. Enter "Convert MBR" to convert the disk to MBR format.
G. Complete the conversion format. Continue to install Win7 in the usual way
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Windows 8 Turn Windows 7 (ThinkPad e440 to Windows 7 hands-on experience)