You can download the Bitcoin software here:
https://bitcoin.org/en/downloadIt will take several days to sync everything up. Be extremely careful about using Bitcoins, as you can get ripped-off very, very easily. For instance, don't use escrow accounts, and do
not do any business
whatsoever within Tor hidden sites (such as the Silk Road 2.0). Instead, use only legitimate businesses; for instance, Tiger Direct is now accepting bitcoins:
http://www.tigerdirect.com/bitcoin/Beyond them, few legitimate vendors exist for bitcoins. You can also buy them instead of mining for them:
https://localbitcoins.com/By the way, bitcoins are typically used for drug sales and other illegal items, excluding, for the most part, illicit and underage pornography, which is typically distributed for free. Excluding illegal drug sales, bitcoins have little purpose in the real world, other than, IMHO, to serve the interests of "free market capitalists." I do run the above Bitcoin client, as I believe that bitcoins may serve
some legitimate purposes, for instance, helping to finance the distribution of Catholic publications and other resources in oppressive Islamic countries. For instance, an underground market could, in principle, exist, where individuals in Saudi Arabia and other oppressive countries could purchase Bibles, Catholic books, rosaries, etc., at very modest prices using Bitcoins.