Q:

supee 7405 Hunk #2 FAILED at 472. Magento 1.8.1

I am trying to install this via shell, but this supee 7405 is giving me a problem.
Originally line 82 was failing too, (failed at line ending)
So I removed the \r line endings in notpad++
The only error I get now is: 
app/code/core/Mage/Checkout/controllers/CartController.php Hunk #2 FAILED at 472. 1 out of 2 hunks FAILED
As a workaround, I tried uploading the patched file, and then running the patch to update the rest of the files, but it still does not work..
No one else seems to have this issue with this file. All previous patches are applied
Any ideas please.

A:

Probably you modified that file. Magento patches require original files. Try to obtain the original file for that version of magento, replace for the one you have now (Backup first), and run the patch installer again.

