For about a week and a half I have not been able to access Steam (online) or League of Legends. I don't use any other games or gaming applications that need to access the internet but I imagine that they would do the same. When I attempt to access steam I am shown a window of it trying to update. after a few seconds of the loading bar not moving I am given this message http://www.bleepingcomputer.com/forums/uploads/monthly_... On League of Legends I was able to update for whatever reason but after I log in it attempts to connect to server then I receive this message http://www.bleepingcomputer.com/forums/uploads/monthly_... I have checked each respective website of each program for solutions to the problem and I have checked other websites for solutions. My firewall is off, I have re installed both programs, I have restarted my computer, I have tried launching them with admin privileges, updated graphic drivers, copied all the files from another computer (where they worked) onto my current computer. I have tried many other things that I cannot remember and so far I have yeilded no positive results.
I had the same issue a few days ago. I ended up reinstalling Steam, unfortunately, without them warning me, the uninstalled their games too, but it did fix my issue. Perhaps you can try the repair option from the control panel/uninstall programs. If that doesn't work, be sure to make a copy of the steamapps folder in the Steam folder. That way you avoid having to download anything.
I have already attempted a full re install with my app data on my external. still no luck, i don't think its related to the program because im getting the same effect for both league of legends and for steam, the only difference between them at this point is that league of legends can still update but steam cannot. even though league of legends was ale to update from the servers for some reason it cannot connect to them after i try to log in. i have also run virus scans with AntiVir and Malwarebytes on both the programs on my C drive. 0 detections found
i currently don't have access to a router I am online through the school network in my dorm, I have been able to access the programs before and my roommates can access them right now through the same connection