Error.404.file

I just got MCPC for myself and was SUPER EXCITED...but....I couldn't play it....here's why...

I went to the Minecraft folder and found a file called Error.404.file I went into the file and my PC crashed...when I booted back up my PC and logged in the back round was white with red eyes in the middle...its funny...because it looked like a face...when I tried to play Minecraft again it just wouldn't load...a few days later a roomer was circling around my school about Error 404...when i got home that day I went to youtube and searched up Error 404 minecraft it took me to this video: https://www.youtube.com/watch?v=DRmU0GSMSqk ...heh...its strange...because I was one of TEN THOUSAND who had this "error" in my Minecraft account...and that little 0.01% chance to encounter them...heh...I had them in my Minecraft and now IN MY SYSTEM!...I am not using that PC to write this...but everytime I use that PC I check that file...double click to access it and...it keeps crashing...I don't know if this is a virus or what...but...what I do know is that he is coming for me...he took over ALL the computers that I logged into with my email...except one computer...this chromebook has saved my online experience...anyways I tried everything I could to get into that file...and nothing worked...and I wanted to play Minecraft for so long...but now...I think I'm going to stay away from it for a while.