I installed Windows 10 yesterday,was working fine last night, today it won't come on. What should I do?

[Windows Central Question]

installed windows 10 yesterday,was working fine last night, today it wont come on

installed great with no problems, but today wint come on at all

 

[stevesu]

Re: installed windows 10 yesterday,was working fine last night, today it wont come on

Laptop or desktop or phone? Is there post? (Post is the first few seconds on a screen...it takes a few seconds for the computer hardware to recognize there is a processor, memory, hard drive, etc. THEN once it sees the HDD, it looks for the OS) If you see post, hit F8 and it will bring up OS repair options should you need them.