Forum Discussion
Unusual behaviour on my PC. Access to all Microsoft services blocked.
What you’re describing is actually a classic network-level blocking / routing problem, and the clues you gave are very strong.
Most likely root causes (ranked)
- Microsoft IP reputation block (false positive)
- IPv6 routing / filtering issue
- ASN / carrier-level filtering
- Broken CGNAT routing
Best immediate workaround
Use a VPN
Or disable IPv6 if that fixes it
Proper fix
- Contact your ISP:
“My public IP is blocked by Microsoft identity endpoints. VPN fixes it.”
- Ask for:
New public IP
IPv4-only routing
Removal from CGNAT (if applicable)
My answers are voluntary and without guarantee!
Hope this will help you.
Was the answer useful? Mark as best response and like it!
This will help all forum participants.
Hi NikolinoDE Thank you for your help and comments. Turns out the problem was (mostly) caused by me. As one of my children was the main user of the PC, I had enabled basic Parental Controls on our TP-Link router. When I switched off the TP-Link "Chat & Messaging" web filter, the problem went away.
When I re-checked, there was no issue with the Wi-Fi hotspot; the issue was only on my home network.
So definitely not Microsoft's fault! I deservedly got a (very professional) "Oh my" from the Microsoft agent on live chat at one point, when I queried whether Microsoft might have blocked my device for some reason 🤣
Given that Microsoft login is required for one drive and account logins on Windows these days, I am surprised that TP-Link appear to have included Microsoft login pages in their "Chat & Messaging" blocks, but there you go, mystery solved!
