Does a clean boot erase everything?
A clean start-up is just a way of starting up your computer with a minimum of programs and drivers to enable you to troubleshoot which program(s) and driver(s) may be causing a problem. It does not delete your personal files such as documents and pictures.
Is a clean boot safe?
A Safe Mode is recommended when there is something wrong with the hardware or drivers, and software related issues. A Clean Boot is recommended when you experience error messages on the screen, but don’t know where it is coming from.
What to do after a clean boot?
After using the clean boot users need to reset the computer back to a normal state to make things more stable. By using a clean boot we turn off services and many startup programs that may affect the usage of a computer.