Can't delete camera files

[phisig74]

I'm a newbie and have just learned that the camera is recording anytime vanguard is on. I have gigs of useless info that I need to delete, but can't; error message is something like; "can't because program is in use". I've closed out vanguard and AHP and Logmein, but still get the same message. After a power outage, my computer is set up to automatically restart and open vanguard, AHP, and Logmein. I've manually closed them out but still get same message. Help?
4 gig older Compac, w/Windows XP; SP3, WildBlue satellite internet.

[dave w]

Use "Task Manager" to check if X10nets" is running.

[phisig74]

I finally got them deleted. Found that the files were too big for the recycle bin; never had that happen before:)