Hello everybody on forums! This forum is great and very useful on number of topics, I red some threads concerning my problem and still looking for solution so please share some insight. I had system disk totally encrypted with Truecrypt, made backup of all data and thought that I could simply delete everything (data, mbr) and start anew in other PC. I booted W8.1 from USB and executed Diskpart -- Clean command upon ex system disk. Windows coudnt install and I ended with Bad disk, according to several Partition tools. Now I know it was a mistake, I should decrypt disk before. So, anyhow, I just want to clean whole disk, I dont need the data. Please help! EDIT: Dont know if its clear, but I dont have options to delete partitions or re-build MBR in apps like Partiton wizard free edition or GParted. TC rescue disks are not at hand.