libpng15-15.dll:

libpng15-15.dll, C:\WINDOWS\system32, C:\Windows\SysWOW64\ Microsoft Dynamic-link library

libpng15-15.dll ?

2. CMD
3. : regsvr32 libpng15-15.dll Enter

RegSvr32.exe :

Regsvr32 [/u] [/n] [/i[:cmdline]] libpng15-15.dll

/n -  /i
/s – 
/u - 
/i -  [cmdline];  /u, 

Snappy Driver Installer

:

:

libusb0.dll libcef.dll libstdc++-6.dll libeay32.dll libxml2.dll libwinpthread-1.dll libgcc_s_seh-1.dll libcurl.dll libgcc_s_dw2-1.dll libiomp5md.dll libmysql.dll libmmd.dll libifcoremd.dll libEGL.dll libvlc.dll libvorbisfile.dll libzmq.dll libogg.dll libiconv-2.dll libintl-8.dll libeay32MD.dll libvorbis.dll libpng13.dll libssh2.dll libimobiledevice.dll libdl.dll.dll libssl.dll.dll libgdk-win32-2.0-0.dll libenchant.dll libassuan-0.dll