When installing WinPcap 4.1.2 on Windows 7 I receive the following message
"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."
I've installed and uninstalled the program several times. According to the WinPcap FAQ I need to delete packet.* and wpcap.dll as well as npf.sys. Done. Additionally, I've removed the Network Packet Filter 'device' using the device manager.
I also did a search in the registry for winpcap with no results. I searched for wpcap and found only one entry - a header file in an include directory. I renamed it to .old with no success.
Further, I downloaded the source code and searched for part of the message above hoping to find how it checks for previous versions. That string (version of WinPcap) was not found in the source code (using grep in cygwin).
Finally, I emailed the two people who are listed as contacts for the program.
I also tried installing the program as an Administrator.
No luck. You all are my last hope. :)
The question is as above - I want to remove the old version of WinPcap. But other questions that could help me are, how does a program check for previous versions? Is there something else I should be searching for in the registry? Is there a way to find out which program is using winpcap? Is there a way to see if any programs have a dependency on winpcap? Any leads would be greatly appreciated.