ISAlog.bak and ISALog.bin

If you have a server with ISA Server 2004 installed you will find in the C: partition the files ISAlog.bak and ISALog.bin

These files will be approx 400MB in size and often taking up valuable disk space on an older system.

The files are not necessary and are for Microsoft PSS to use if you have a case open with them. You can remove these files by editing the registry key

HKLM\software\microsoft\isaTrace\BootTracing

Set this value to 0 and reboot the server, you can then delete the files manually and reclaim the disk space.