About three months ago my computer crashed and I had to have it rewashed and was unable to recover anything it all. It started by getting eight missing operating system on restarts or boot up, well for the last week now every time I restart my computer I get my lenovo logo and then missing operating system on a black screen. It's happened three times now and so far what I've done is just tried to restart it powered off power and on and it will keep displaying the same thing. I have to physically remove all power sources from my computer for 10 to 15 minutes plated back in and if I'm lucky it boots up fine. What can I check, as is common and how can I fix it. If you could just give me a list of things to check and go over. And if you wanna know and answer to a question like what programs I have installed just ask me and I will include a screen shot maybe offer a one in right now it, able to take one. By the way that something else usually I can hit control prey to take a screen shot that has not been working either but this boot up missing operating system is a much more important. This is my production PC and my main PC if I lose it I lose my business.