Under normal circumstances there should only be 2 entries in there:
autocheck autochk *
These are the entries responsible for running a chkdsk on your drive
after bad shutdowns. Other programs sometimes put entries in there also
but these other entries should usually not stay in there after they are
run. Other examples of things that sometimes end up in there:
If you try to run chkdsk on the boot volume Windows will tell you that
it can't get an exclusive lock on the disk and ask if you want to
schedule a chkdsk on the drive the next time you reboot the computer.
If you answer yes Windows will place an entry in there to run chkdsk,
the entry could look something like this:
autocheck autochk /p \??\C:
To defragment inuse system files PageDefrag by SysInternals will put
this in there to have the defragmentation done before windows starts:
pgdfgsvc C 1 -o
If you ask Windows to convert a FAT32 drive to NTFS is will put this in
there:
autocheck autoconv \DosDevices\x: /FS:NTFS
Partition Magic also at times puts entries in there and the one you had,
OODBS, belongs to O&O Defragmenter. Like PageDefrag above, it would
also probably be used to defragment files that cannot be defragmented
when Windows is running.
John