I just bought Lenovo z510 that came with windows 8.1. I faced a lot of problems and thinking to change the version of the windows 8.1 to 7. If I format my laptop does my warranty void?
If I backup my windows or C: drive. Can I just restore it back so that it doesn't effect my warranty? Any answer will be highly appreciated and sorry for my bad English because it's not my main language.
It won't but if you ask for tech support they might not help you until Windows 8 is reinstalled.
Manufactures don't put a warranty for operating systems, those warranties are for the computer and all the hardware that is installed in the computer. One thing that does Void a warranty is breaking the seals on the computer case. This is a question you need to ask on the computer manufactures web site in the support section of their web site for a correct answer.