I wanted to clean my computer using some quite complex program with many functions as registry problem fixing and driver problem fixing. So I started a scan. Result was about 500 problems to fix. I decided to use backup option before choosing to fix. So after backup and fix, program demanded restart. All loading was fine but when came to load desktop, it did nothing. Just black screen with no response. So i restarted and used safe mode. It started to write out drivers and then it stopped on "classpnp.sys" and again jumped in black. Can anyone help how to restore system? Even tried Linux (SLAX) but even with some "Windows modification" program didn't run.