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=== Step 1 - Installing TortoiseSVN ===
Easiest of the steps, you don't even need google, I'll do that for ya. Click [http://downloads.sourceforge.net/project/tortoisesvn/Application/1.6.6/TortoiseSVN-22.214.171.12493-win32-svn-1.6.6.msi?use_mirror=iweb] for the 32 bit version, and here for the 64 bit version. Not sure which you want? Go for the 32 bit version, its a safer bet.