GTA freezing at loading screen? I found the solution!
If your like me, GTA IV was running great since I purchased it on steam (many months ago). Then all of a sudden it would crash as soon as the loading screen characters disappeared ! Well, after a month of forum surfing I finally found the one thing that worked. I tried EVERY SINGLE THING YOU COULD THINK OF. Literally...... Anyway, after much work, the only thing that got me running again was installing and uninstalling Quicktime. I never had it before (QT) but for some crazy reason this worked. Hope this helps you guys and gals struggling to play.
More aboutfreezing loading screen found solution
This could help a lot of users, since most of the threads are regarding GTA IV in the Video Games forum.