This is what fixed the problem for me. Hope it helps a few people out because I know lots of people have been experiencing it lately.
If restarting Steam does not resolve the issue, please exit Steam and delete the following files:
Steam.dll
SteamUI.dll
ClientRegistry.Blob
These will be found under your Steam installation directory - by default, this will be C:\Program Files\Steam\ (this may vary if you specified a different installation folder, or if you have moved your Steam installation).
Following this restart Steam, it will update then you should be good to go!
Enjoy!
If restarting Steam does not resolve the issue, please exit Steam and delete the following files:
Steam.dll
SteamUI.dll
ClientRegistry.Blob
These will be found under your Steam installation directory - by default, this will be C:\Program Files\Steam\ (this may vary if you specified a different installation folder, or if you have moved your Steam installation).
Following this restart Steam, it will update then you should be good to go!
Enjoy!











