Battlefield 3 Origin Install issues - error 262145:5

Now, I'm not sure if this actually will work. But the only thing I would recommend to try is to uninstall and install again.

1. Open Origin
2. Right click on the Battlefield 3 cover in Origin
3. The option lowest in the drop menu should be "Uninstall". Click that.
4. When it have uninstalled, try reinstall completely from Origin, no disks.

To download from Origin:

1. Click on the cover of Battlefield 3.
2. A drop menu should appear, giving you the option to "Install".

I hope this will work for you :) And if it does, i wish you luck on the battlefield!

The other answers should fix the problem, but you will lose all the progress you had once.

This problem is caused when your client (Origin Downloader) downloads some corrupted files. Everytime you restart a download, Origin try to open ALL the files to get their CRC's, but these corrupted files has wrong CRC's. So you must delete all these corrupted files that are listed in a LOG file.

Do this:

1. Go to C:\ProgramData\Origin\Logs and open Client_Log.html

2. Open it in your browser

3. Sroll next to the end of the file, and look for some red phrases saying something like

   Error opening file "C:\Program Files (x86)\Origin Games\Battlefield 3\Core\EACore.dll". (5)

So I had to delete the EACore.dll, and other files listed together.

If there is more files listed, delete them all and repeat the process until Origin can start downloading fine. That would be sad if some very large files were corrupted, but I had luck.