Cannot update assassins creed 3

graphicscard

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Jan 28, 2012
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Hello,
I installed assassin's creed 3 (r.g mechanics) and completed it. I didn't care to update it till v1.03 was needed for the new dlc.

But when i try to update to v.01 to v1.02 the game, it says 'cannot backup DataPC.forge'. It says it cannot backup from multi/DataPC.forge to PATCH_BACKUP/multi.DataPC.forge


after clicking ok there comes another box which says"An error occured while updating multi/DataPC.forge. please help me in solving the problem.