Constant Hard Drive I/O Reads and Writes

Cheers Everyone,

After the latest update of Norton Internet Security (ver. 22.5.0.124) and updating Google with Norton tool bar my hard went berserk and was constantly running (Windows Vista SP2 on HP desktop w/Quad core and 2 SATA HD) .  I immediately remove the Norton tool bar and restored Google back to its original state.  That helped, had to check other programs and processes and those were set back to before Norton update.  Now I have NIS.exe doing constant hard drive I/Os, 24 million reads, 3 million writes, and 38 million I/O others.  The CPU is not impacted by this but the constant I/Os and slow on start-ups worry me.  I checked things over but have no idea what to do with something like this.

Does anyone have any ideas what to do?

Thanks and Best Regards