>I have a client with a W2K Server. They have the Trend Micro OfficeScan product installed on its system (C:) drive. This product downloads large (~17MB/day) virus definition files to a specific folder on C:.
>
>Trouble is, they don't have a lot of free space on C:, so within a couple of months their C: drive fills and their server crashes. It would be nice if Trend would clean up old definition files itself but it doesn't seem to do so.
>
>My first thought was to create a batch file that deletes all of the definition files and schedule it to run periodically. The only trouble is that for the virus definition update process to work properly, the *last* definition file must be present e.g.
>

>LPT$VPN.456
>LPT$VPN.457
>LPT$VPN.458
>...
>LPT$VPN.473
>LPT$VPN.474
>LPT$VPN.475  <-- Latest one, this file must not be deleted
>

>It's simple to make a batch file that deletes *all* of the update files, but much more challenging to write one that deletes all of them except for the very last one.

Could be feasible in a batch file, but why bother?

n=Adir(aVpn, "lpt*.*")
asort(aVpn)
for i=1 to n-4      && leave the last five
   if isdig(justext(aVpn[i,1])
      erase (aVpn[i,1])
   endif
endif

Build an exe out of this, schedule it to run an hour after the download, and sleep well :).

You may add some fullpath() handling, if you don't want the exe to reside in the same directory.