After installing Steam on another computer and while launching it I got the error – steam.exe (main exception): unable to load library Steam.dll .
I did some research and have uninstalled and tried installing again and again but still the same issue. Some forums even recommended that I need to copy files from disc onto Steam installed folder. I even made sure none of the Programs mentioned in Steam Support are interfering with the installation. I have changed my Bitdefender firewall to permit Steam exclusively, but it failed too.
Finally, I realized the application blocking Steam to connect to its network was Peer Guardian. From the task manager, I have closed ‘pg2.exe’ and I was able to run the Steam application properly. You can even see the Peer Guardian Logs and allow the connection to Steam servers.