The T440 comes with the WIN8 system, the hard disk format is GPT partition format, and the Win7 must be MRP format, so the hard disk format must be modified from GPT to MRP, the method is as follows:
Ready to work, download "Computer shop U disk Startup disk making Tools" (Baidu, go to the official website to download)
1. Use "Computer Shop U Disk Launch tool" in the "one-click Make USB flash drive" function to make a simple U disk boot.
2. Plug the USB drive into your computer, restart your computer, and set the BIOS boot mode to "USB stick boot".
3. After entering the system, run Diskgenius 3.7, format all the partitions, and then delete the partitions.
4. Run cmd, enter DiskPart, then Listdisk (T440 comes with two hard drives (1TB+16GB), two require conversion format), enter select Disk 0, enter clean, then convert MBR, hard drive format has been turned Changed to MBR format.
5. Run the Diskgenius partition and reboot after the partition is complete, so you can install the system in the usual way.
T440 Installing the WIN7 system