I had both ubuntu and windows 10 as dual boot install both as mbr and everything was going ok but once booted to windows 10 and something happened in the middle of operation which made that problem I believe. when searching for errors that appeared I found out that the hard drive may contained both GPT and mbr partitionings (somehow) and that lead to error. I had wiped my hard drive using ubuntu on a live CD using the command dd if=/dev/zero of=/dev/sda but that also didn't solve the problem.
now: I'm trying to install ubuntu as a single boot as MBR but I can't do it. it shows me those errors on live CD boot up on the background logs
pardon my phone camera quality but it's the best I could get.
I don't even know whether it's either a software or a hardware problem with my drive but ubuntu continues and shows me this after instillation.
see ? the partitioning is Unknown()
Sorry for that long description. hope you can help me.