Can you give me some idea what kind od specs your computer has please. What version of windows 7. Are you using Virtual box 3.2.8 (Latest) ? Sounds a little like a permissions problem to me. Did you run the installation as the Administrator ? How many times have you actually tried to install virtual box ? Because you have to completley erase all previous.......Does your computer support a VTx X option in your Bios ? Is it checked ? What about disk space ? Name any other errors you may find- please ?