Because EA Sports no longer sells or supports FIFA 08, it is often hosted on abandonware archive sites. While these sites are popular for preservation, downloading from them is technically a copyright violation.
If you just want soccer gameplay, newer titles or free-to-play options like eFootball are safer and more compatible with modern systems.
The game was designed for 4:3 monitors. You may need community-made "Widescreen Fixes" to prevent the image from stretching.
You often need to right-click the .exe file and set it to run in "Compatibility Mode" for Windows XP (Service Pack 3) or Windows 7.