high cpu usage

[resso]

i'm using toshiba satellite 1950. p4 2.5Ghz 512 RAM.
can anybody tell me why do i always have a high CPU usage
when i run an application? why it is always around 90-
100%?
what's the difference between CPU usage and memory usage?

thank you for your attention...

 

[Wesley VogelX]

resso;
What process is using the highest percentage? Is it System Idle Process?
CPU is your processor: p4 2.5Ghz.
Central Processing Unit.The CPU controls the operation of a computer.Units within the CPU
perform arithmetic and logical operations and decode and execute instructions.In
microcomputers, the entire CPU is on a single chip.
Memory is your: 512 RAM.
Also called main memory.The working space used by the computer to hold the program that is
currently running, along with the data it needs, and to run programs and process data.The
main memory is built from RAM chips.The amount of memory available determines the size of
programs that can be run, and whether more than one program can be run at once.Main memory
is temporary, and is lost when the computer is turned off.