Fonts come in zip form. So you will need Winzip or some other compression/decompression utility to open these file.
All fonts are guaranteed virus/bug free.
In case you do not know how to install fonts to your machine here are some easy instructions.
Click on the font that you want to download.
Choose Save to disk (or equivalent) when asked.
After file has completed downloading, double click on the file to open it.
Goto Control Panel, then to fonts and open folder.
Click on File, then install new font.
If you are running win9X this will do the trick..
If not then you will have to follow the instructions that came with the OS.