There is no spare Tcpip.sys on your system so…
Download the following file to your C drive so that you have C:\tcpip.sys
https://dl.dropboxusercontent.com/u/73555776/tcpip.sys
THEN
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Close any open browsers.
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Close/disable all anti virus and anti malware programs so they do not interfere with the running of ComboFix.
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Open notepad and copy/paste the text in the quotebox below into it:
FCopy::
c:\tcpip.sys | c:\windows\system32\drivers\tcpip.sys
Save this as CFScript.txt, in the same location as ComboFix.exe
http://img.photobucket.com/albums/v666/sUBs/CFScriptB-4.gif
Refering to the picture above, drag CFScript into ComboFix.exe
When finished, it will produce a log for you at C:\ComboFix.txt which I will require in your next reply.