Download and install the Arena Program. (If Arena's complexity freaks you out, you could download and install the simpler Tarrasch Chess GUI instead.)
Then download the Ufim engine and install it in your chess program. The Ufim engine has strength settings from 700 to 2000. (Once you install the Ufim engine in your chess program, you'll have to configure the Ufim engine and set the engine's strength setting. When configuring the Ufim engine, make sure you check the "DelayOnWeakLevels" box so the engine doesn't move instantly.)
Arena 3.0 program link:
http://www.playwitharena.de/downloads/Arena_3.0Setup.exe
Tarrasch program:
http://www.triplehappy.com/Home.html
Ufim 8.02 engine (UCI format):
http://wbec-ridderkerk.nl/html/details1/Ufim.html
Can someone post a link or something so that I could download it to my computer. I would like the hardness to reach 1800 rating level, but anything will do, thanks.