Hello! Recently I tried to do that in this thread: Win-7 x64: failed to install CTM, RBRX and Keriver !? and failed. The problem is: I have bought brand new Lenovo G580 with GPT disk, its booting is UEFI. I want to install a time machine (Comodo's CTM or Rollback RX/Eaz-FIX) but they can't support UEFI/GPT. Windows 7 Ultimate 64 bit is on the computer. I want to convert UEFI/GPT to MBR without loss of data and windows reinstall. Is it possible? I tried: 1. Converting a gpt to mbr in Windows Interface or Command line - DISKPART - it said "Disk is not convertible". 2. I succeeded in gpt to mbr conversion with BIBM and Paragon Disk Manager Pro but couldn't make the Windows bootable. 3. After conversion to MBR windows rescue disk just said that there is wrong windows and refused to work. So is it possible to convert GPT/UEFI disk to MBR without loss of data and windows reinstall? Or maybe there are some other time machines (like CTM or Rollback/Eaz-Fix) which support GPT with UIFI boot? Thank you.