Large Download kills Server

When Downloading large files (300 MB and up) the DLLHOST.exe on the webserver will chew up VM untill there is none left. After this you can do 2 things to regain control of the machine:

1. Reboot
2. Kill the DLLHOST.exe process

Anyone know why this is happening and what I can do to fix it?

Hi,
MDAC is used for downloading files so I recommend you to get the latest version of MDAC. I will also try to optimize downloading if possible with the next version. 
You may also take a look at here for other suggestions
Thanks for your report.