I am still not 100% sure that ACT is the culprit...
ACT Premium V 10 - Windows XP Pro SP 2
I have reinstalled on 3 clean networked computers. Before the installation, no problem, after, something grinds away at the hard drive taking the whole drive (up to 30 GB) within an hour. ACT has been the only thing that has changed on these fresh installs. One of the installs was a download from ACT's web site. I have the latest and greatest virus programs, I have run Spybot 20 times.
I am not versed on SQL, but wonder if it may be the issue. The directory that is "attacked" is WINNT. Another odd thing, the WINNT directory grows exponentionally, but I cannot "see" any files that are written to it.
This has me and my IT person (who hates ACT by the way) totally puzzled.
In short, temp files (i.e. tmp1C8.tmp ) get created when users sync. I'm not entirely sure, but it appears that it occurs when they sync with attachments. Temp files on our system vary in size from 1 to 12 MB's, typically. Get enough of these over time,and you lose Gig's!!
Since ACT! does not allow you to specify the temp directory it uses (which would be nice), I set my system temp variable (which are typically in your .\windows\sys32\temp folder) to a different (and larger) drive. Whenever I get to it, I'll create a script that deletes files with a .tmp extension.