Mass Effect 3 won't lauch after install.

So I bought the ME trilogy around christmas and had a lot of fun with ME1. When I finished it, I went straight to ME2. Now, this was not alot of fun, since after I launched the game for the first time, it woulnd launch again. So I looked around, found some tips, and later I was playing. About 9 hours in, I got the same problem again, and a reinstall wouldn't fix it this time. so I looked some more, and then ran both the .EXE in compatibility mode for Windows XP Service Pack 3, and it worked again! But now I have the same problem with ME3, wich is somewhat frustrating. The game ran the first time I pressed start, but no more. I have reistalled it twice, ran Origin as admin, tried to launched the game in offline mode, repaired the install, lowered that bar in UAC and set the game to run in compatibility mode for Windows XP Service Pack 3. This is where my knowlege stops, and where I ask for anyone's else.

EDIT: I got in contact with customer service and they told the following:

ManojK: Well it looks like your origin files are corrupt
ManojK: Please follow the steps to fix this:
ManojK:

1) Manually uninstall origin
2) Flush DNS cache
3) Clean Boot
4) Use Ccleaner
5) Re-download Origin

I don't know if all of the steps were necessary, but it worked.