Many demo versions are set to expire after a certain number of uses or after a period of days from the first use. Some demos offer all the capabilities of the full version. The software available for download on the Internet is usually compressed so as to reduce storage space and download time. In order to use the software once you have downloaded it, you will need a file decompression program to expand the software file. There are many different formats depending on which operating is being used.
Some Tips Downloading can take time depending on the size of the program.
Some sites give size details. Download at off-peak phone rate times whenever possible. Its advisable to use a virus check on any software that you download. Downloading from the more reputable sources should result in less problems afterwards. Some download sites offer a choice of servers from which to download, choosing the nearest one available physically may not be the nearest on the Information Highway.