It is highly recommended to get in the habit of properly unregistering and re-registering DLL files.

Yes you would probably not experience any issue with KiXforms DLL by just overwriting it, but the preferred method is to run

Unregister
regsvr32 /u kixforms.dll

Register
regsvr32 kixforms.dll

That can be run from the RUN command on the start menu so only takes less then a second.


Yes one can place a DLL in the installation folder, but that is not a best practice method. DLL files should be located in %WINDIR%\SYSTEM32