Okay so I have tried fixing this for 6 hours strait and still no fix.
There's no actual problem with it, no actual bug, but the software that wants to police that software has utterly freaked the hell out and I can't access it. I was hoping to check out the new features, now I'll have download software I already had and hope Steam decides not to be an idiot anymore.Quick forum searches indicate the only real solution is uninstall the local content and reinstall. Update - Valve has made it clear to me that they are in no way responsible for actually delivering software via Steam. If the above option doesn’t work, you can try resetting the Steam configuration in the following way: You just have to click OK, since this is precisely what you want, and your downloads should resume right away.If clearing the Download Cache doesn’t work, you can try to change the Download Region: go to Steam Settings, then choose the Downloads menu and change the Download Region with one of your choice: there’s a good chance that this will fix the issue. It downloaded the TF2 updates last night and now the validation on the file is stuck at 100%, even after exiting Steam and even after rebooting the computer.
So basically software I have bought and installed is trapped on my computer.PS: I have tried defragment but all it does it crash steam and the validating process.PSS: I have also did a steam ticket with no response.Alternative Fix (Credit to Fred) Make a new folder where you want your games to be on your hardrive (example: steamgames) Go to steam settings Steam library folders. Move all your previously installed games from your previous steam library folder (steam/steamapps/common) to the new directory where you installed the small game.If you still have problem getting this fixed, don't hesitate to comment or if you have better suggestion feel free to share on this page. This error is not a bug or something, this is because we’ve added incorrect hierarchy of folders for your existing steam library.