http://download.cnet.com/WinRAR-32-bit/3000-2250_4-10007677.html
http://www.megaupload.com/?d=8H2GBK1G
Tested Virus Free.
1.Download Win RAR if you don't have it.
2.Download Portal Link above.
3.Once download it save it to your desktop or where ever you want, just remember where you saved it.
4. Right click on the Win RAR file and click on extract to portal.
5. Once you've done step four you'll get a folder. Open it. Once opened go on play portal or if your computer is slow go on "My_Pc_sucks_Portal". Let it take its time to load and simply click on play.
Enjoy
.Virus free
.Tutorial
.Tested