SCSINT.DLL is a file used by Iomega removable drives. You have two options.

1> If you want to keep your IOMEGA drive, reinstall the Iomega software , which if you dont have, you can get off the internet from http://www.iomega.com/

2> If you dont want an IOMEGA drive, use the Add/Remove feature to remove any IOMEGA software, and /or use a registry cleaner such as JV16Tools to remove any leftover registry entries. JV16 Tools can be found at http://www.macecraft.com/