OPKs are the OEM preinstallation kits. The OPK is used by companies like Dell to install Windows across network to multiple computers unattended. It's not supposed to go to the end-user AFAIK. It should be safe to delete but back it up first beforehand just to be safe.
Maine has a good swing for a pitcher but on anything that moves, he has no chance. And if it's a fastball, it has to be up in the zone. Basically, the pitcher has to hit his bat. - Mike Pelfrey