Windows 10 completely I'm not satisfied. So I'm going to install windows 7. I don't have windows.old file and I have been using 2 years windows 10 but not satisfied. The problem is do I delete C: folder and system file only or all disk parts are able to install? I have data in D: drive and I don't have enough space in usb drive and don't have portable hard disk. Waiting for your reply. And give me instructions before installation. This is my laptop model Lenovo Core i5 7th Gen - (8 GB/1 TB HDD/DOS/2 GB Graphics) IP 320-15IKB Laptop
