Expand C: after installing Windows 8 over Ubuntu

[titanium_spoon]

Okay, so I just installed Windows 8.1 Pro on my laptop (which previously had Ubuntu) and everything work out. When I tried to download something, it said I didn't have enough space. When I looked at my C:, it said I had 7.89 GB left. I probably made the partion too small during the installation, and I want to know how to expand it without re-installing windows. This is what my C: Looks like:

Thanks in advance!

 

[rgd1101]

http://www.partition-tool.com/

 

[COLGeek]

See this link for several options:

http://answers.microsoft.com/en-us/windows/forum/windows_8-windows_install/how-to-increase-windows-8-primary-drive-c/5cecdd32-8a9f-4c7e-a43d-094527686d64