Hello and welcome.
1) You have some form of malware attached to your network stack.
Boot to safe mode, navigate to C:\Windows\System32\drivers and delete this file, then reboot:
ymctidu ymctidu.sys Fri Sep 17 12:33:58 2010
Then run Malwarebytes after updating definitions to scan the machine and remove all it finds.
2) Update Realtek lan driver:
Code:
1: kd> lmvm rt86win7
start end module name
8f545000 8f56a000 Rt86win7 T (no symbols)
Loaded symbol image file: Rt86win7.sys
Image path: \SystemRoot\system32\DRIVERS\Rt86win7.sys
Image name: Rt86win7.sys
Timestamp: Thu Feb 26 04:04:22 2009 (49A65B16)
CheckSum: 0002BDEF
ImageSize: 00025000
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