Please check LiveCAD FAQ, issues and solutions are the same.

Windows ® XP (32 bit), Vista ® (32 bit), Windows Seven ® (32 bit)
CPU - 2 GHz
1 GB Ram
Available disk space: 1.4 GB
Supported Video cards: NVIDIA GeForce ® 6600 or ATI ® X1600 with 128MB supporting pixel shaders and vertex shaders 3.0
DirectX9c or higher
Internet connection
The program is a 32-bit software and is not officially supported on Windows 64-bit.

Please ensure that the key is ok, beware of “o” and “0” to “l” and “1” etc. …

Problem with catalogs of objects, no catalog
We invite you to do this to restore the catalog:
- tab “window”
- click on “parameter bar”

Please follow the procedure below if you are using Windows Vista:
- Start, then Control Panel
- Switch to Classic View (left)
- Go to User Accounts
- Then click Enable or Disable User Account Control.
- UAC asks for confirmation, click Continue.
- In the new window from opening, uncheck Use User Account Control to help protect your computer and click OK.
- To ensure that changes are made, you will be asked to reboot the computer.

If you use Windows 7, please follow the instructions below:
- Start, then Control Panel
- Switching to Large Icons displays the top right
- Go to Users
- Click on Edit User Account Control
- Lower the slider to turn off security for user accounts
- Click Apply, and restart your computer