I had the same problem: the error was File not found, while opening HTML files in chrome, but I resolved it as follows:
BEFORE:
1) I saved a html file abc.html in a folder name C#.
2) When I was opening the abc.html in Google Chrome, it was showing error as "file not found". But it was working fine on Firefox and Internet Explorer.
AFTER:
3) What I did then is, I simply changed the folder name C# to csharp without space and re opened it in Chrome. It worked.
4) The moral is: Make sure you don't give any space in a folder name as some browsers don't support it.