I found this question, but it is more than 6 months old. I have the same problem and just happened last week. jlu_downloads folder took 222 GB space of my hard drive. I guess that has somthing to do with Liveupdate. Since it is in the temp folder, will that be safe to delete those files?
======I have installed the SMSSMTP ver 5.0.1 (patch 200), and for some reason the logs and the jlu_downloads (C:\Documents and Settings\Administrator\Local Settings\Temp\jlu_downloads) increment the size of the files filling the hard drive, I have set the size of the logs to 512 Mb and to retain this to 5 days, also configurated the queue of the badmail in sender group policy to reject the smtp connections not to defer. Some idea to stop this increment of the files.? =====
Thanks,