Windows cannot be installed to this hard disk space

I've been using the XP system, Windows 7 is now popular, and so I intend to drop XP using Windows 7. I happily bought win7, and insert its disc and step by step installation. Here I select a location where XP is installed as follows:

Click Next and then be ready to begin the installation, but it also found that the following dialog box. Oh, miserable, how can not be installed? Also, it's reported "Windows cannot be installed to this hard disk space; the partition contains one or more dynamic volumes that are not supported for installation."

I'm not willing to quit Setup, then again on the Internet to find, only to find there is indeed a case. Windows Vista, Windows 2008 and Windows 7 really can not be installed on a dynamic disk, which is to ensure that data security on the disk. To solve this problem, it needs to convert dynamic disk to basic disk. Dynamic Disk Converter specifically designed to resolve these issues, it can safely convert a dynamic disk into basic disk, if you want to try, here is to download.