Launch failure!!

[zahnartz62]

I have been enjoying CoD since US intro. Yesterday got download from steam. Flew my Bf110 for a hour or so this AM, very nice. Went to fly again later and after few seconds of orange cross hairs, black screen that turned grey-black..I waited a long time and finally used "ctrl-alt-del". White message said "game launcher failed". went to google and saw others had similar problem some months ago. One suggested DL Ubi game launcher file as a fix. I installed in UBI but no change. Win 7X64. Has been working very well till now..Please advise. John