You helped me solve my problem too! Thank you so much I was finally able to download my favorite games and update the ones I already downloaded. I already thought of contacting support steam, but everything was solved without her intervention.

I have encountered a similar problem, and I can tell you that there are several ways to solve it. Now I have solved it, and I can safely download games, and enjoy them. So, there are several options for you to consider: Method 1. Run Steam as an Administrator
Method 2. Configure the Steam Client service to start automatically
Method 3. Repair Steam Client Service via Command Prompt
If some of these methods will help you, you can be sure of it.

I wanted to download some games on my new gaming computer, so I installed Steam myself. At first, everything was fine, and I downloaded two games, but when I tried to log in the next day, I could not do it because there was an error. I already tried everything - reinstall the steam, restart it and restart the computer, but none of this helped. Who can tell me how to fix it?