How do some programs know how long you've used it even after you uninstall?

Subject: How do some programs know how long you've used it even after you uninstall?

Date: Mon May 13 20:11:14 2002
Posted by Duane Wills
Grade level: 7-9 School: Mulvane High School
City: Mulvane State/Province: Kansas Country: United States
Area of science: Computer Science
ID: 1021335074.Cs

Message:


I've used lots of "shareware" or "trial" computer programs that always have a
little window that says, "You have been using our software for X days. Please
register." Even if you uninstall the program and delete the files, some programs
always seem to remember how long you've been using the program. How does it know
if you got rid of all the files?

Re: How do some programs know how long you've used it even after you uninstall?

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