can you post a screen shot of your device manager so I can se what network adapter is shown??
also never heard of 'mbarn.exe' -have heard of mbam.exe aka Malwarebytes and it is an antimalware program NOT an antivirus program--get it here: Malwarebytes : Solve your malware problems with our help
it would be very useful to know more specs on your PC--manufacturer, motherboard model#, how much ram, etc
a quick google search provided this link Download RAS Async Adapter 5.0.2175.1