minimum 10gb required for master database update

Hi

I'm hoping there's a simple solution to my problem. Is there a way to update the "Master Internet Threat Database" on WES 7.2 if you have less than 10.0gb spare disk space?

I have moved all the log files to another drive which ironically has 200GB free but the system was installed on a 40gb partition. OS is Windows 2008 R2.

Any help would be appreciated. Thanks, John