i dunno how this is happening...
to put the game i always do the same and always work :/
i do this:
1. download the client with an outside program such as IDM or JDownloader, although now with windows 8 i find it also cool ^^
2. after download is done i create a folder with a diferent name from the previous one i had. for example if i had it before EpicPW now i will make it EPW
3. copy the downloaded zip/rar into the new created folder
4. extract using 7zip to this same created folder, now i will have the extracted folder + the normal zip/rar file
5. open the antivirus and add an exception for this whle new created folder
6. open the launcher.exe
7. wait for it to says complete or file error
8. click on the Verify button, this will update the client to the last existing version
9. when its done i close the launcher
9. i open the game through the elementclient.exe
10. done