Board Thread:Roblox help and discussion/@comment-34658359-20180211060944

I downloaded roblox from what I believe is the official roblox website roblox.com and I was playing counter blox:roblox offensive than suddenly I got a gray screen no commands were working esc ctrl+alt+del nothing so I shut down my pc than it worked for like 5 minutes it happened again and now every time I turn on my pc it opens to a blank grey black or white screen instantly I want to uninstall it I can't get it to the home screen to do it and I can't access the pc storage through a ish cord with my phone I need help I don't want to have to wipe the hard drive of my 4 year old gaming pc 