set file Read only but i can delete it, why?

Hi
today i setup some files in read-only mode , in my deskop

but i click on them ,strike the delete(canc) key and they were moved in the trash

i setup some files in my directory c:\test\ , read only and is enough to strike the can key to delete

i setup some files in my usb in read only mode , strike delete and they disapears , deleted


what's wrong?
how can i protect my files to be erased?

have a nice day

 

Read-only only prevents a file from being modified, not deleted.
If you want to prevent deletion, you need to alter the file security (remove delete permissions from appropiate users/groups).

 

I fixed this with an ISR-software. Any file can still be deleted, but an ISR-software puts it back after reboot.
I tested this myself, once I deleted MS Office, Firefox and Thunderbird completely.
After reboot everything was back and working.

 

I fixed it by removing my delete key...

 

which software isr do you use?

 

Its in his sig: FirstDefense-ISR

 

so does disk imaging software

 

You can do this with any ISR-software or any Image Backup software.
ISR is of course more convenient (= reboot) than an IB software.

The principle is simple : I don't want any good or bad change in my system partition, unless I do it myself. That keeps me in control without doing anything.
After each reboot, I have my system back as it was when I installed it from scratch. Any object too much is removed, any disappeared object is added again, any changed object is replaced.