Connection troubles after running a Disk Check

[Xylas123]

Hey all, my brother has been having problems with staying connected to the internet after he ran a disk check last night. He can connect to a web page and such after unplugging and re-plugging the ethernet cable or disabling and re-enabling the network connection on his PC, but only for a few seconds at a time. We have tried other solutions like flushing the DNS and using a different ethernet cable. He is connected to a WiFi router directly from his motherboard ethernet port. There is only 1 other computer on the wired network, which is mine, and it works fine. Any ideas? I've been going at this for a few hours now and I've got nothing. Thank you.

 

[Ralston18]

Was there some particular problem or reason for running the disk check?

Any error messages or pop-up windows with respect to the disk drive or the network connection problems?

Who manages your network router?