How do I extend my partition In

[Adam18911]

I created a partition of 40GB to install windows 8 as a dual boot.

I need to extend this partition as I need more space but the extend button is greyed out.

Is there anyway to get around this?? I have some unallocated space ready but its not working.

Thanks

 

[gregrocker]

Please post back a screenshot of Disk Management - Post a Screen Capture Image.

This video show the tool which works best to extend partition easily with Partition Wizard - video help.