15 R?, cannot access website and some apps like steam

My laptop is Alienware 15. Recently I change my win11 back to win10 because my hardware doesn’t sup win11. For the first week all things are good. But yesterday there was a system update and today I couldn’t access website and apps like steam and battlenet. It’s not internet problem because my other device could still work under the same internet. I tried to do following the error solution online but useless. I also reset my laptop again but can not still access website. It always showed me the website I tried to access was dangerous. What I can do to fix my laptop. Please help me.