ac1st16.dll:

ac1st16.dll, C:\WINDOWS\system32, C:\Windows\SysWOW64\ Microsoft Dynamic-link library

ac1st16.dll ?

2. CMD
3. : regsvr32 ac1st16.dll Enter

RegSvr32.exe :

Regsvr32 [/u] [/n] [/i[:cmdline]] ac1st16.dll

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

Snappy Driver Installer

:

:

autorun.dll accelerometerdll.dll acadres.dll amtlib.dll AdbWinApi.dll acbrandres.dll apiclient.dll advpack.dll ahclient.dll awesomium.dll.dll AcroPDF.dll avcodec-57.dll ac1st16.dll AdvrCntr6.dll ADOBEPDF.dll ACEODBC.dll authport.dll avastIP.dll awt.dll aac.dll AavmRpch.dll a1.dll A3d.dll A3DLIBS.dll AbaleZip.dll abocomp.dll a0fkyeum.dll aaclient.dll a__fkfrs.dll a21j7cpx.dll