"C:\Documents and Settings\Administrator\My Documents\Arduino\libraries\" is your sketchbook library folderHelloWorld_i2c:21: error: no matching function for call to 'LiquidCrystal::LiquidCrystal(int)'
C:\Documents and Settings\Administrator\My Documents\Arduino\libraries\LiquidCrystal/LiquidCrystal.h:56: note: candidates are: LiquidCrystal::LiquidCrystal(uint8_t, uint8_t, uint8_t, uint8_t, uint8_t, uint8_t)
And I suspect you will find an old copy of LiquidCrystal in it.