Oh dear,
Some background info: all the apps on my pen drive is the latest version available from this site and I have the latest signature files for ClamWin Portable.
Just ran a scan on my PortableApps USB drive and below is the scan summary. The virus scanner on my PC did not detect anything when I ran a scan on the same drive afterwards.
Scan Started Thu Aug 28 21:06:01 2008
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G:\PortableApps\Toucan\Toucan.exe: Trojan.Zlob-7844 FOUND
G:\PortableApps\WinSCPPortable\App\winscp\PuTTYPortableLinker.exe: Trojan.Zlob-7844 FOUND
----------- SCAN SUMMARY -----------
Known viruses: 402314
Engine version: 0.93.1
Scanned directories: 1855
Scanned files: 12609
Infected files: 2
Data scanned: 1327.65 MB
Time: 1025.891 sec (17 m 5 s)
--------------------------------------
Completed
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You should try another anti virus software, if you have it, and compare the results.
Also see this: https://portableapps.com/node/15234
It talks about the problem you are having
“There is a computer disease that anybody who works with computers knows about. It's a very serious disease and it interferes completely with the work. The trouble with computers is that you 'play' with them!”Richard Feynman