MDK 5 can not found nRF devicehttps://devzone.nordicsemi.com/f/nordic-q-a/5445/mdk-5-can-not-found-nrf-deviceplease, help me ㅠ_ㅠ it mades me crazy My PC is Windows 8.1 &amp; 64 bit. I try to install / repair / change SDK (6.1.0 version, 6.0.0 version, 4.4.1 version), but my PC shows me messages like those. (I try to follow solutions; devzone.nordicsemien-USTelligent Community 13Thu, 05 Feb 2015 16:16:12 GMTRE: MDK 5 can not found nRF devicehttps://devzone.nordicsemi.com/thread/19012?ContentTypeID=1Thu, 05 Feb 2015 16:16:12 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bdbed7ed-0990-4808-8f1a-cffa29e95aa2Asbj&#248;rn<p>Since you have Keil 5.13 installed the recommendation is to download the pack installer for Keil. Download &quot;nRF51_SDK_7.2.0_cf547b5_packs.zip&quot; from <a href="http://developer.nordicsemi.com/">developer.nordicsemi.com/</a></p> <p>With the pack structure you should have the chip definitions in place and be able to compile your examples.</p><div style="clear:both;"></div>