Windows 7: Windows Explorer constantly hanging

While running the VM. Using Parallels 5.0.9 with a bootcamp partition.

 

Hi snp227,
Windows 7 in Boot Camp partition is not yet officially supported by Apple and thus, by Parallels Desktop:
http://support.apple.com/kb/HT3920
http://kb.parallels.com/en/6826
Are there any options to try to install Windows 7 in virtual environment and check the performance?