Finally got the issue resolved on my own. Rockstar gave me lots of suggestions, none of which worked, and ultimately told me the problem was likely due to my older OS (Win7) and strongly alluded the current version of the game won't work with Win7 and would require upgrading to Windows 10. I didn't feel their assessment was accurate but by that point Rockstar had run out of ideas and pretty much dismissed me.

I eventually discovered the remedy on my own through process-of-elimination. I deleted my Profiles folder in My Documents/Rockstar Games/GTA V and the game started right away, albeit at the very beginning. It did NOT require an upgrade to Windows 10, as I'm still using Win7.

I save every new game version and simply loaded a recent save, which I archived prior to experiencing any problems and was able to go right back to where I was nearly two weeks ago when all this began.

The problem has been RESOLVED.

Out of nowhere my game launches fine but never actually starts. It isn't freezing or crashing, and the little spinning ring at the bottom right of the screen never stops spinning, yet the game never starts. It does this with the current game using the Rockstar launcher as well older versions using NoGTAVlauncher. Same result either way.

Any idea what's happening there?

@darkblue Got mine working too using the method you used, though like you, I'm not sure how long it'll last but at least it IS working... for the moment anyway. This whole issue is a Social Club problem and this sorry ass program has been the absolute worst thing Rockstar ever incorporated into the game.

@iammistahwolf Same here... retail version, and the NASCAR update is precisely when my problem occurred. Wouldn't doubt if it's the same problem. From that moment my old games suddenly ceased to work and I've not been able to play them since. I've tried reinstalling/updating the bypass launcher (No_GTAVLauncher), reinstalling various elements associated with it, and nothing's worked. It's probably something really simple but I'm out of ideas and sadly no one seems to be able to say with any certainty what to do so I guess we're just out of commission. It works fine for YEARS and then suddenly just POOF... gone - UNBELIEVABLE

I haven't been able to play my older saved games since the last update earlier this year when they suddenly started crashing moments after I start them. I think the problem may be a Social Club issue but I'm just not sure. It worked great for two years using the latest version of No_GTAVLauncher, then one day it suddenly started crashing no matter which saved game I load into my Grand Theft Auto V folder. I don't know why it won't work anymore and can't seem to get anyone who can help me. I have terabytes upon terabytes of older saved games on my home server but can't play nary a one of them because they suddenly stopped loading. Not sure if it's related to the "The Social Club failed to load due to an incomplete installation (code 16)" issue or from something else but if anyone knows I'd sure appreciate a remedy because I'm seriously stuck

@QBit07 Thank you for the info. I did find the latest update and it works great. Now I just need to find out why my older game versions no longer launch using No_GTAVLauncher. Something obviously changed somewhere for older versions to suddenly stop working when nothing's changed on my end. I guess I'm just wondering if RockStar made any recent changes that may have caused it.

Did something recently change because all of a sudden No_GTAVLauncher no longer launches older versions of my retail game version. This launcher has worked great on version 1493.1 for a long time now but two days ago it started crashing as soon as I launch it. Did some change occur I don't know about? Also, I went to check on an updated script hook for the latest game update and noticed the old script hook update webpage appears to be gone. Where does one acquire updated script hooks now?