========= Please enter your reply ABOVE this line =========
Hello,
A staff member has replied to your question:
Hello Wanghao,
Thank you for contacting Steam Support.
We apologize for the delay.
Please exit Steam and go to the folder called C:\Program Files\Steam\ (this is the default location for a Steam installation - if you set a different installation directory, you will need to browse to it).
Delete all of the files in this folder except:
- Steamapps and Userdata folders
- Steam.exe (this file is listed as an application and features the black and white Steam logo)
Restart your computer.
Then, launch Steam.exe from within the Steam installation folder, and not from a pre-existing shortcut.
With Steam running, re-test the original issue.
Note: This process will not affect your currently installed games.
If the issue persists, make sure your network is optimized for Steam by following the guide below: