I will confirm one of @rambozo37 's advice about physical connexion.
Firstable, in command prompt as admin , reset your TCP/IP protocol to be sure that there is no problem with all TCP/IP protocol stack :
netsh int ipv4 reset
same with IPV6
netsh int ipv6 reset
1 . [if your are wifi connected]
You ping is unstable, due mostly maybe because of very busy wifi channel .
So, if you are Wifi connected, use software to scan free/or less busy channel and force the router to the best channel:
2 . [If you are linked by Ethernet cable]
- It could be bad ethernet cable (try other cable to check)
- Or It could be infected process.
Please, follow theses steps:
Copy, and paste the log/report after analysis on PM : (2 files : frst.txt & addition.txt)