please help asap

I uninstalled comodo and want to install it again.

The uninstallation went ok, but when I went to ‘program files’ to delete the comodo program folder, for a fresh install, it said

Cannot delete cavshell.dl: Access is denied.
Make sure the disk is not full or write protected
and that the file is not currently in use.

Yesterday, I uninstalled comodo, and deleted the comodo file from my programs folder with no problems.

Please can anyone help me with what to do, I want to reinstall comodo, but I dont know if the above error message means I have a system problem.

I run windows XP

thank you

Did you reboot after the uninstall? You need to reboot first to be sure you can manually erase possible remnants,