Today, I've encountered a problem when trying to install Windows7 on my new laptop. The installer claimed that Windows couldn't be installed on a GPT drive, so I tried to turn the partition table into MBR. I backed up the partition, and created a new msdos partition table on GParted, but that removed all my partitions, including my backup one.
How can I restore my partition table backup? I've tried using gdisk, gpart and sgdisk.