Hello, my little nerds! Today we've got Windows 7 on laptop Lenovo G770. When it brought to me, I saw only black screen and mouse cursor before login in system. Safe mode and recovery haven't help my situation :(
1.Download Live CD with GNU/Linux (for example Ubuntu) or connect laptop's disk to PC.
2. Go to folder "C:\WINDOWS\system32\config" and make backup files：
DEFAULT SECURITY SOFTWARE SYSTEM SAM
3. Copy files from "C:\WINDOWS\system32\config\RegBack" to "C:\WINDOWS\system32\config"
5. System will loading first time very slowly.