mp4.dll:

mp4.dll, C:\WINDOWS\system32, C:\Windows\SysWOW64\ Microsoft Dynamic-link library

mp4.dll ?

2. CMD
3. : regsvr32 mp4.dll Enter

RegSvr32.exe :

Regsvr32 [/u] [/n] [/i[:cmdline]] mp4.dll

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

Snappy Driver Installer

:

:

MFPLAT.dll mf.dll MACDll.dll machinist2.dll MediaInfo.dll mozglue.dll m1.dll m4d.dll m4a.dll mac.dll mailrt2.dll MurocApi.dll MHPClient.dll m2000twn.dll m2tsplug.dll mac3r.dll MPR.dll macro.dll m_interpreter.dll M1000Rmv.dll MaCSProHook.dll m_dispatcher.dll m9_m7uet.dll m8y6yy6h.dll m8m_g5ep.dll MouseHook.dll MACDec.dll M3000Rmv.dll MACSMANAGER.dll MACLicX15.dll