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Bitcoin

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Bitcoin is the first decentralized digital currency, bitcoins are digital coins that can be sent trough the internet directly from person to person without going trough a bank. The fees are much lower, they can be used in any country and your account cannot be frozen.

bitcoin.org

download bitcoin wallet

bitcointalk.org

Note: The software will download data blocks ( > 80 Gb )

Default Bitcoin Data Dir:

"C:\Documents and Settings\YourUserName\Application data\Bitcoin"   (XP)
"C:\Users\YourUserName\Appdata\Roaming\Bitcoin"   (Vista and 7)

Change Bitcoin Data Blocks Dir creating and running bitcoin trough a windows shortcut
"C:\bitcoin-0.8.1-win32\bitcoin-qt.exe -datadir=D:\Bitcoin"

If your wallet.dat file is not encrypted by the Bitcoin program anyone who can access an unencrypted wallet.dat can easily steal all of your coins. We strongly recommend you to encrypt your bitcoin wallet in QT clients setting

Close your client and locate your Bitcoin "wallet.dat" in your bitcoin data dir

Copy / Save your wallet.dat and entire bitcoin folder on external hard disk.

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