The super-duper in the title refers to the magnitude of this Windows fix rather than its keenness.
for /R %systemdrive% %i in (*.dll *.ocx *.ax *.acm) do (regsvr32 /s "%i" & regsvr32 /s /i "%i")
This command will re-register with Windows every dll, ocx, ax, and acm file on the system drive. Alternately,
%systemdrive% could be replaced with
%systemroot%\system32 to only re-register those files in the Windows (or Windows\System32) directory and its subfolders, and ignore those in Program Files, etc. (of course those may in actuality be the problem). You could also add other self-registering filetypes (a few EXEs have actually been known to self-register).
Also, this is not exactly a cure-all. While it may indeed fix some (or even a lot) of problems, it also has a tendancy to reset a lot of settings. Most files, when they register with the system, will perform an initialization routine that usually sets variables, files, registry entries and such to the preset default, thus wiping out any changes you’ve made. This may actually be the required step to fix something you messed up, but only if you know which file needs to be re-registered; this super-duper one will reset everything.