I Operate Outlook 2007 in cached exchange mode. Immediately upon starting Outlook, several 1 GB HTT* files are generated in C:\Windows\Temp. These files vary in number during the Outlook session, but at least several of them persist until Outlook is exited. This problem only occurs when SSL scanning is on. If SSL scanning is turned on, excluding the exchange server’s domain form scanning will also alleviate the problem. Excluding Outlook and SearchProtocolHost.exe from protocol filtering also prevents the formation of the HTT* files. I am using Vista Ultimate SP2 x64 and running NOD32 version 220.127.116.11.