Need help to install everything via launcher

Hello, i downloaded today the launcher for unreal 4, i already used it many monthes ago, without any problem. But now, i have a big problem, when i download anything via launcher, it start downloads, and when the download is done, it says “verifying”, then “installing”, then back “verifying” and finally “downloading” again, and it’s a loop. After many reboot, restarts and all, i managed to install UE 4.10.2, but now i’m trying to download assets, and samples, and the problem is the same and now nothing is working. I have my last log, session during wich many downloads / verify loops occured. I stopped trying now, it’s always the same, cannot find any working answer online…
Here is my system specs :

Processor : AMD FX-8350 Black Edition, 8 cores @4Ghz
RAM : 8Gb GSkill
GPU : Sapphire R9 280x OC 3Go
PSU : Seasonic 850W
Hard drive : My launcher is installed on a 1To Western Digital.

The log is too long ( 30.7Mo of text OMG ) for a pastebin, so I’ll upload the .log on mega

Thanks for helping, hope you can do something for me :frowning:

Hi Titus974,

Try the troubleshooting steps in this section of the troubleshooting guide.

If nothing works, follow the steps here to generate your Dxdiag/system specs.

Hi Titus974,

We haven’t heard back from you in a few days, so we are marking this post as Resolved for tracking purposes. If you’re still experiencing this issue, please try the suggestion that I mentioned above then post back here with the requested info.

If you need anything else, feel free to ask.