The Installation Manager has analyzed your system resources and detected problems that can prevent installation or proper operation of SolidWorks. You can address these problems after you complete the installation.
The amount of physical memory on your computer may be insufficient to run the SolidWorks products you intend to install. You can cancel the Installation Manager and install more memory, or install memory after installation.
This refers to the disk space on the drive containing the Temp directory. SolidWorks will not run properly if there is not enough space in this directory.
If the message indicates that you need more disk space to proceed:
Delete files and click Rerun Diagnostics.
Repeat until a message informs you that enough space is available to proceed.
For more information, see http://www.solidworks.com/pages/services/SystemRequirements.html.