Process Explorer : no signature present..............

i have an IBM core 2 duo, thinkpad  r61, with 2 gig of ram. i am running windows 7 ultimate 64 bit.

when i run process exp about half the ".exe's" under the "varified sig"  says "no signature present in the subject". you get no usefull info when you "right" click and go to properties. most of it says "error". when you want to "kill" the process it says "access is denied."

I have run a system file check and found no problem.

i have uninstalled 3 of the programs that have this and re-installed, still the same.

One of the programs is AVG anti-virus and it looks like it is running OK.

thanks,

inetbogey.