Lucky for you I had the same problem. I'll go through the steps that someone else led me through.<div><br></div><div>Reboot your computer, then run Device Manager. Enable "Show Hidden Devices" in the "View" menu. Go to "Non-Plug and Play Drivers" and tell me if "NetGroup Packet Filter Driver" is there or not.</div>
<div><br></div><div> - Jay</div><div><br><div class="gmail_quote">On Fri, Sep 7, 2012 at 11:35 AM, Keith Brown <span dir="ltr"><<a href="mailto:keithnbrowncarlisle@hotmail.com" target="_blank">keithnbrowncarlisle@hotmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<div dir="ltr">
<div style="font-size:12pt;font-family:'Calibri'">
<div>I’m trying to install the Managment Utility for my TP-Link TL-PA211
powerline adaptors, which seems to rely on WinPcap 4.1.1.</div>
<div> </div>
<div>I’m running Windows 7 64-bit Professional on a custom built desktop
pc.</div>
<div> </div>
<div>During installation it says “A previous Version of WinPcap has been
detected on this system and cannot be removed because in use by another
application. Please close all the WinPcap-based applications and run the
installer again”<br><br>Now I've never installed WinPcap myself before, and i
don’t know what i have installed which may have done as a side effect.</div>
<div> </div>
<div>I’ve done some digging and discovered that WinPcap doesn't appear in the
list of programs to uninstall in programs and features.</div>
<div> </div>
<div>I also found this exchange on the board and tried following it <a href="http://www.winpcap.org/pipermail/winpcap-users/2006-July/001246.html" target="_blank"><font face="Times New Roman">http://www.winpcap.org/pipermail/winpcap-users/2006-July/001246.html</font></a></div>
<div> </div>
<div>I found packet.dll and wpcap.dll in C:\Windows\SysWOW64 as i ran a full
search, and i found npf.sys in C:\Windows\System32\drivers all of them had the
same version of 4.0.0.1040</div>
<div> </div>
<div>What should i do?</div><span class="HOEnZb"><font color="#888888">
<div> </div>
<div>Keith Brown</div></font></span></div></div></div>
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<br></blockquote></div><br></div>