I have used CCleaner for quite awhile, and like it a lot -- thank you! But when I ran an a-squared malware scan today, it found Trojan-Dropper.Win32Agent.acq in two previously downloaded CCleaner setup files: ccsetup123.exe and ccsetup124.exe. It did not find anything in earlier setup files or in ccsetup125.exe or in ccsetup126.exe.
I don't remember where I downloaded the contaminated files from -- but I usually go to castle cops for a link, or to hippo, or major geeks -- and sometimes I think I use the link provided from inside CCleaner. Just don't remember...
A-squared said it removed the infected files, but I am off to run more scans...
Because you always want to check to see if anything else reports a false positive. Whether you know it's clean or not. Don't take a chance. It's best to play it safe, you should know that.
A few weeks ago McAfee VirusScan identified most of my downloaded Ccleaner setup files as infrected (and deleted them without even prompting me!). They actually put a warning onto their website and corrected the virus definitions within a few hours.
Have you checked the A-squared website if they have updated virus definitions?
All scanners are subject to false positives and will eventually give one, even the mighty eTrust EZ Antivirus. Also if you already have an infection on your system it can infect other files.
I took a look at the A-squared Forum to see if there were any other cases of this. I didn't find this exact case, but it appears that A-squared thinks it finds Trojan-Dropper variants in a lot of programs, it's apparently the most common false-positive.