Manual Installation of SDR#

Manual Installation of the RTL-SDR drivers with SDR# for the RTL-SDR

1) Download the RTL-SDR Drivers, and extract the rtlsdr.dll file from the x32 folder (or x64 folder if you have a 64-bit OS) into the SDR# folder: (original link seems to have died recently)

2) Download zadig and place it into the SDR# folder:

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  1. n3mmr

    AirSpy’s sdr# distro still uses the old, no longer functional, url in install-rtlsdr.bat.
    Modify accordingly.

    Also, if you have an x64 windows distro of sdr#, you should look for the dll in the x64 subfolder, not the x32.

  2. Frank M Koerber

    Is there a simple step-by-step guide to installing the drivers and software on windows 7?

  3. Milt

    To clarify couple of things in a question I just asked. I am operating Win 10, 64 bit and the actual message I get is “DRIVER INSTALLATION FAILED (COULD NOT ALLOCATE RESOURCE).

  4. Milt

    When I hit the “Replace Driver” button, I get a message: Download failed, “could not allocate resource.” How do I work around this?


    I just bought an android stereo for my car. My goal is to use the SDR as scanner and Shortwave receiver as an added feature in the radio. The radio runs android 5.1 and is not rooted. The driver installs good, but doesn’t work. As soon as I open any app and tries to deal with the driver, the program just disconnect. However I tested another app that doesnt use the driver (the one that tracks planes) and works pretty good. How can I make the SDR driver work om android 5.1?

  6. Simon

    OK I just bought 2 V3 USB RTL-SDR radios. One works.
    In Zadig the one that works shows up as RTL2838UHIDIR Wheras the one that doesnt shows up as
    RTL2832U. I used the same procedure on both to change the drivers. The one that doesnt work gets a response of ‘Cannot access RTL device in SDR Sharp. How can I fix it.?

  7. anonymous

    in sdr# software in the rtl sdr controller it is showing device is unknown and i cannot set the RF gain. what to do?

  8. Henk Oegema

    I can’t install the driver for my NooElec R820T SDR & DVB-T NESDR Mini on my Windows7
    The USB ID: 0BDA 2838 00
    As device I choose: Bulk-In, Interface (Interface 0)

    In the Driver field is written: WinUSB (v6.1.7600.16385) => WinUSB (v6.1.7600.16385)
    i.s.o. RTL2832UUSB( => WinUSB (v6.1.7600.16385)

    What is my problem?

  9. Jason

    The link to /trac/raw-attachment/wiki/rtl-sdr/ is not responding. Is the server up today?

  10. Mike

    Installation is tricky but possible. Read the directions from the Quick Start Guide and follow them closely. Install your SDR# directory in C:\ not Program Files. When logged in as root, set that SDR# directory to have write permissions also (default read only). Then go into Norton or other antivirus and set an exception for your SDR# directory and all subfolders. It is key to make sure that the .bat installs properly. It seems the WinXP version zadig works in Win7 also.

    Not sure about Win10. It’s too new to support many programs and drivers so my sympathies. I’ll try it in a year or 2 when they work out the bugs and driver incompatibilities.

  11. Dennis Farr

    Unable to get RTL-SDR to work after upgrade to WIN10. Worked on same PC using WIN7. There is no .bat file in the SDR# zip file. Loaded and ran zadig.

    • admin

      What version of SDR# are you running? The latest versions come with the install-rtlsdr.bat file included in the zip, I just checked, it’s most definitely there.

      This page is to help you if the bat file won’t run on your PC for various reasons.

  12. Mike

    Norton claims that pthreadVC2-w32.dll is an “Insight Network Threat and has been removed. There are many indications that this file is untrustworthy and therefore not safe.”

    Threat name: WS.Reputation.1

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