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!