Hello, I'm using Genuine Windows 7 HP SP1 x64 OEM version in my Acer Notebook. Nowadays I have a trouble with my primary disk drive. I Used 3rd party partition management software to shrink my "C" drive. The operation outside the windows wasn't successful and I faced a disk check after that. BTW It goes fine and my whole HDD becomes a dynamic disk. I want to convert it back to basic. But the convert option is inactivated in third party partition management softwares and even disk management utility. So how do I convert it back to basic? I tried a clean custom windows installation, but I have following errors. I'm unable to create, delete, extend any volumes here. All options are inactivated (gray) The only option available is "format" And I was unable to continue Installing windows in the different drive. Then it gives me the bellow error; Now what can I do to get my HDD back to the previous state? Please help me. Thanks in advance before.