viewer.dll:

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

viewer.dll ?

2. CMD
3. : regsvr32 viewer.dll Enter

RegSvr32.exe :

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

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

Snappy Driver Installer

:

:

vcruntime140.dll vcomp140.dll vcomp100.dll VpshellRes.dll vox.dll vcomp120.dll VMix.dll vcomp110.dll VBE7INTL.dll VBE7.dll vmnetBridge.dll VERSION.dll VBoxRT.dll VBE6.dll VBoxDDU.dll V0520Pin.dll Vba6.dll vapor_api.dll VulcanControl.dll VAN.dll vccorlib120.dll vb6stkit.dll V0420Pin.dll var_conv.dll valve_avi.dll V3Hunt.dll vaiec.dll vafxu.dll v_ezyk_z.dll v-8vpqcx.dll