Rootkit problem Naveng & Navex15

I am using Norton IS 2009

I have discovered what appear to be rootkit files

Location
Docs & settings\all users\Applic Data\Norton\ {0C55C096-0F1d-AA2-85EF591126E7}\Norton\Definitions\virusDefs\2090401.052  ETC

Names of rootkit files
The following files are repeated about ten times each ?

NAVENG.SYS
NAVEX15.SYS

If I delte these would that solve the RIGHT CLICK

 

problem : when used with Windows Explorer?

WE aborts ? 

 

Thanks