Why boot-time scan on a VERY newly reformmated laptop?

Why did i get a boot-time scan when this computer was JUST reformmated yesterday and only connected to the internet for less then 4 hours behind a router and external SPI/NAT firewall??

Just reformatted computer and installed Vista Ultimate with all service packs + updates. Installed a few other programs like adobe, aim, msn live, flashplayer, and shockwave player (nothing else). Then installed zonealarm forcefield and finally counterspy v2. Did a full scan and nothing detected (obviously because it's a newly reformmated computer). This morning I installed zonealarm Internet security suite and after being prompted to reboot, CS enters the boot-time (bootup) scan and deletes a file from quarantine (which is impossible because nothing was detected yesterday evening!)

Quarantine file: 67c1ec09-a5b7-4dd8-8777-10303b293b48

No filesharing or any downloading of any sort has occured during that time period (besides the above listed programs and possible drivers/etc. for the laptop)

Is there any logs of what CS decided to delete?
 
sad I’m frustrated
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