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.
In your case, you can upgrade to Windows 7 depending on edition and architecture of Windows Vista you have installed. If you are running a 32 bit version of Vista and want to upgrade to a 64 bit version (edition of Windows 7), you will have to a do clean install, this applies vice-versa.ou will have to backup and do a clean install, there is no in place upgrade path from Windows Vista Home Premium to Windows 7 Professional: Upgrade paths: When making significant changes to your computer such as an upgrade, it is always recommended you backup your system prior to installing a new version of Windows.