I had the same trouble with 7.10 Desktop Edition. Basically, it seems that the partition editor that runs while installing can't format a drive larger than 50 Gb or so. In any case, the solution is to ...

Installation type Now, you can choose your preferences, such as the language and the installation - we recommend selecting Normal installation. Confirm your choices by clicking on Continue. Do not ...

Partitioning your hard drive is part of the process and could affect your current data. Make sure to back up your system completely before you begin. Depending on the arrangement, you may need to ...