If the window appears every single time you start up Steam, you're probably experiencing an issue with Steam realising it has updated.It's worth noting that this is a well discussed issue with no official solutions available, there are plenty of different suggestions on how this can be fixed though and some of these work for some of the people experiencing the problem some of the time, so you'll want to try all of them if you really want to stop Steam from verifying every time you start it.Edit: it's not completely not doing it, it's doing it like 1 or 2MB at a time, explains why the workshop files worked. You can try these: https://steamcommunity.com/discussions/forum/1/64881674... Sometimes these user permissions break and need to be refreshed.This issue is most often caused by third party applications interferring with Steam.Steam will always check for updates on startup and download and install them automatically to ensure that you're running the latest version.Additionally, Steam will occasionally verify all of its files, to ensure that everything is as it should be. This window is displayed while the update is installed or verification process is running to provide feedback to you (the user) that something is actually happening, rather than staying completely silent, leading you to think that the application hasn't started.
It's always a good first step to make sure that you restart Steam as well as your computer.
I doubt that STEAM will answer any Emails, and the site is pretty poor on support.
It doesn't seem like it should be so hard to "update" my CD seriel number and download whatever is needed for offline gaming.
The specific reason for the error will be shown in the parenthesis at the end of the error message.
The following fixes will resolve most update and installation errors with Steam.
This issue can be exacerbated by anti-virus/internet security applications blocking Steam from doing what it wants to and reading all of Steam's files as the Steam application attempts to verify them.