How to register a DLL file in Windows 7?

Question

Hey I tried adding a DLL file in Windows 7 by copying to system32 folder, but I couldn't as Access Was Denied. Actually there is an existing DLL file and I'm trying to replace it. How can I do this in Windows 7?

Answer 1

Here is the full usage of regsvr32.

Answer 2

To register a dll, you open a command box as admin and then use regsvr32 /i <dll_name>.

Tha said, your problem seems to be that you just can't copy the file. Again, open a command box as admin and do the following:

1. ren c:\windows\system32\filename.dll c:\windows\system32\filename.old
2. copy c:\randomlocation\filename.dll c:\windows\system32\filename.dll

If the file is in use, you should do this in safe mode, command prompt only. If you hose your system, you can delete the dll you copied, and rename the .old back to .dll.

Answer 3

Unregister the existing DLL file first (with the /u switch), and then register the DLL. This way, the un-registration routine will clean up the existing settings which often helps when re-registering.

Answer 4

To register a comm .dll or .ocx on Windows 7 32-bit, do the following:

1. Copy .dll or .ocx to c:\windows\system32

2. Type cmd in Run menu, it will search cmd.exe, right click and click Run as Administrator

3. It will show a prompt at c:\windows\system32

4. Type regsvr32 ocxname.ocx to register .ocx

   or

   type regsvr32 dllname.dll to register .dll

Answer 5

There are usually two issues with regsvr32 on Windows 7:

1. UAC
2. The fact that you may have a 64 Bit OS and the file dll you need to register is a 32 Bit one.

To get around the "Access Denied" problem, start the command line as admin, in the start menu type 'cmd.exe' and then right click the 'cmd.exe' entry and 'Run as Administrator'.

If the DLL is 32bit and in the 32Bit Windows directory, use the 32bit version of regsvr32 at c:\windows\sysWOW64\regsvr32.exe