Windows 7 runs unreasonably slow, so I decided to install Ubuntu instead.
I clicked Install but it says that I do not have at least 4. 4GB of disk space. But my hard disk's capacity is is 320 GB.
How can I fix this and get Ubuntu installed?
Please be aware that you will be permanently removing your windows installation. This process cannot be undone. You will loose every data on every partition you delete. Keeping a backup is your responsibility.
Said that, first you have to decide how you want to install Ubuntu.
Hope this might help.. Good luck...