hdf.dll:

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

hdf.dll ?

2. CMD
3. : regsvr32 hdf.dll Enter

RegSvr32.exe :

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

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

Snappy Driver Installer

:

:

HCNetSDK.dll HID.dll hlvdd.dll HTMLayout.dll halmacpi.dll hccutils.dll hack.dll hw.dll HALionOne.dll HAL.dll HighPoly.dll HardDisk.dll halion.dll hapi.dll H41.dll hwcompat.dll halaacpi.dll halacpi.dll HALBORG.dll handes.dll halmps.dll halapic.dll halsp.dll hapdbg.dll HaoZipExt.dll H323MSP.dll Handsfree.dll hanjadic.dll ha6bl5-g.dll HalExtIntcLpioDMA.dll