The Insert AutoCAD Drawing add-on inserts a .dwg or .dxf file into the active page in an existing Visio document as a read-only ActiveX object. The active Visio application window must contain a document drawing page when this add-on is run (otherwise an error is generated).
Upgrading your memory is the easiest way to modify your computer's speed. Ask a salesperson at a computer store what kind of memory you need for your computer. The sticks range in price from $10.00 to over $600.00 depending on how much memory they have. The individual memory sticks hold from 128 MB RAM up to 8 GB.
Download and run the Windows 7 Upgrade Advisor to see if your PC is ready for Windows 7. It scans your hardware, devices, and installed programs for known compatibility issues, gives you guidance on how to resolve potential issues found, and recommends what to do before you upgrade.