Registering and unregistering .DLL files

At the Taskbar, select Start|Run. Type:
cmd
A command prompt opens. You should either use 'CD' to change to the relevant directory (folder), or enter the full path to the file.

Registering a file

To register (or re-register) a file, type:
regsvr32 <filename>.dll
or
regsvr32 <path>\<filename>.dll
where <path> is the path to the file, and <filename> is the name of the file.

Unregistering a file

To unregister a file, type:
regsvr32 -u <filename>.dll
or
regsvr32 -u <path>\<filename>.dll
where <path> is the path to the file, and <filename> is the name of the file.