These files safe to delete?

Vista Home Premium 32 bit, Vista SP 2

NIS 2010 17.8.0.5

 

I found these files in

C:|Windows\System 32

 

jupdate-1.6.0_13-b03

jupdate-1.6.0_15-b03

 

File Type Text Document

 

and a few others like that

 

Scanned with NIS and they show clean

I know they have to do with Java, but I'm thinking they are from the older versions

Can these safely be deleted? if they remain can they mess up newer Java installations, in that it gives the newer builds false direction?