NET VIEW doesn't refresh often

Hello

I'm using stupid&easy command line tools to work with apache and an intranet.

I use 'net view' to retrieve a file of power-up computers and it works fine,
except that it seems to cache the result, even when I don't use the \cache
flag. It means that a computer that has been turned off still appears in 'net
view'

I could ping through all the list, but that's a pain. (the reason why I did
not use a ping loop in the first place is that computers that are turned off
make the ping command extremely long to respond)

thanks for any input, or alternatives ! (bear in mind we're using WinXP Pro,
on a non-administrative account in this case, and I like to sticks to .bats
not .wsh)