how to get rid of files ?

after doing avast scan the scan log says some files could not be scanned becuse they are password protedted…

they are all remnants of the previous spybot antivirus (and babylon tool bar etc) which was uninstalled prior to getting this current avast antivirus…

so avast scan report says all these files could not be opened …should i be getting rid of these files ?
how to do that…please explain in very simple way how to get rid of these unwanted files…

windows xp desktop avast free vrsion

Tried this http://www.safer-networking.org/faq/how-to-uninstall/