cannot connect to icloud from windows 11 PC

Anyone find the source of the problem yet (a driver or program)?. I spent 4 hours with Apple Support going through many of the trouble shooting steps, including removing antirus software, reinstalling icloud and itunes and creating a new windows user admin account, but no success yet in fixing the issue or identifying a specific cause. I have yet to disable and enable services and was hoping someone here had done that. My issue started a little over a week ago when I found my icloud calendars would not sync with my Dell Windows 11 PC. Feels like there must have been a Windows update or simialr that drove this. My problem is with the app and the icloud website. Occassionally I have got through to the website, but I always get a server error with the app. I have no issues with my windows 10 laptop, iphone or ipad (all on the same wifi network).

It's not Microsoft. The Killer Network suite is owned by Intel, and in my case it shipped with new Dell hardware. The problem is that all of these corporations are too big and too "perfect" to listen to the little guys like us or anyone else, including each other. For me, the bigger question is - what are Apple doing about it? It is they who should be resolving this with Intel. iCloud is not an insignificant part of their product portfolio.

I have the same issue and I have done exactly what you have with no joy. Very frustrating !!

Thank you, that worked! I think much better solution then deselecting IPv6.

You don’t need to turn it off compkey just some of its options in the settings

Simple fix and worked perfectly. Thak you. (Now can you explain why Microsoft created this unnecessary problem for icloud users?)

Thanks for your help.

Great point. Thank you.

My computer doesn't have Intel Killer Network Service.

Interesting. More grist to the mill (for others to consider I think).

My problem is still gone away with the service disabled. I don't miss it!

Neither does mine