Game dead

Hi,I just downloaded the RaceRoom Experience this afternoon,but deleted it soon,then disaster happened.

I clicked the GTR2 icon,at first there was an error shown on the screen indicating a virus.Then I found the GTR2 start icon in the game folder disappeared...Interestingly,all my GTR2 folders had this problem.I think the fucking STEAM did this,Simbin detected that I changed some files so the licenses of porsche and ferrari are again valid in my computer,am I right?

Now what should I do?

I am now using the digital version.If I buy a DVD version,will there be no license issue?

I still have my disc and a clean install from years ago, not sure how to rar the entire install though.

install again gtr2 and add again the patch 1.1.0 and lobby update