Reoccuring problem KEXT

[K8JWT]

I am getting a reoccuring problem when I am installing software on my 3 month old Mac Mini with MACOS 10.6.4

The error box I get reads as follows.

System extension cannot be used

/Systems/Library/Extensions/

Try to reinstall

BJUSBLoad
CHUDKernLib
CHUDProf
CHUDUtil
EPSONUSBPrintClass
hp_designjet_series
hp_Deskjet_io_enabler
hp_Inkjet1_io_enabler

Next few same as above just the number increases 1,2,3,4,5,7,8

hp_io_printerclassdriver_enabler
hp_Laserjet_io_enabler
hp_Officejet_io_enabler
hp_Photosmart_io_enabler
hp_PhotosmartPro_io_enabler
hp_qc_io_enabler

After clicking "OK" the box goes away and everthing appears to install correctly.

Any idea as to how to correct these errors? I do not have any of the above listed printer connected to my Mac?

Thank you,
Jacob Tennant