If you are experiencing this patching error:
This is the SOLUTION:
So why did this happen and how to prevent it:
- Download and extract this compressed file (it contains the Air files used by the game client before the patch). Then copy.
- Go to this file directory: C:\Program Files\GarenaLoLPH\GameData\Apps\LoLPH\Air\Adobe AIR\Versions
- Overwrite the folder "1.0" with the one you've just downloaded.
- Try patching again.
If you'll study the image you could see the message errors, "target window checksum mismatch" and "Failed to merge". This happens whenever an installer wants to merge an old file with the new one for an update but was unable to do so because of a checksum mismatch. Checksums to files are like what fingerprints are to human beings. Checksums are used to identify the integrity of a file.
The patch doesn't proceed because the Air file you have right now is not the file that it intends to update.
So why did this happen?
My guess is that you stumble upon a guide in the internet telling you how to improve the performance of your LoL client by manually updating/overwriting the Air files in the LoL folder with the most updated one that you have on your C:\Program Files\Common Files\Adobe AIR\Versions.
So to prevent this from happening again don't try to alter any file in the game folder.