Last march I purchased the "Ultima Cyclone" computer from Overclockers but from about 5 months ago I have been getting overheating issues. My screen constantly flashes black every few seconds and after some time will shut down. I then have to start in safe mode and restart otherwise I can not get back in. I do not know what is causing it or how to fix it. I have tried simple solutions such as removing dust but this makes no difference.