Screensavers in Windows XP

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A minor problem but....
I seem to have the screensavers in 4 Windows libraries now: all the same. Is
this normal?
I have them in C:\Windows\system32, which seems to be the 'primary' one, yet
I also have the same screensavers stored in the following 3 files:
C:\windows\$Ntservicepackuninstall$
C:\windows\servicepackfiles\i386
C:\windows\system32\cache
CAN I DELETE those 3 files above?
.