I was playing a game called 7 days to die and I was loading mods which replaces certain files in the games folder,when I was playing some in-game error codes pop up about' cannot save game :newworld ,permission not held on client' or something like that but it has happened before so I didn't worry about it,more error codes poped up but I ignored it and then my pc froze into like a screen that looked like a mix of static and like a glitch I try control alt delete but nothing ,I restarted and it was stuck on the starting windows 7 logo and then BAM the blue screen of death,the error was :"BAD SYSTEM CONFIG INFO"so I restart nothing and then I restart and try: booting onto last known config,safe mode,taking out second harddrrive, taking out one ram stick and then the other but all still take me back to the BSOD .during the weekend my pc wouldn't boot (BOOT.MGR IS MISSING) so I had to switch my sata cables around to get it to boot so maybe my main harddrrive is crashed ?please help and thanks for any replies(PS I have win 7 and I didn't download updates or try to upgrade to win10 and I have avast pro antivirus and nothing poped up when I was accessing or moving the mod files so I don't think it's a virus)