Download Part 2 , then paste it in your EE patch download folder replacing the old corrupted one. After doing that run TW2EE_Patch (installer. Which is located in the same folder) and it should patch the game fine without any errors.
EDIT:
For filesize, just incase someone wants to know
Part 2 - 286mb
EDIT 1:
Some people say its only Part 2 that is corrupted and needs to be replaced, can someone confirm this so i can edit this and advice people to only download Part 2, thx.
EDIT 2:
Its now confirmed, you only need to download and replace Part 2 for the patch to install properly. Thanks to the people who confirmed it, "SkelterMelter" and "Hardtarget".
