ClamWin Portable v0.99.4

billon on 15 Apr 2018

ClamAV is a virus and spyware scanner whose database is constantly maintained by a group of volunteers and updates are always available for free. Note that the program does not contain an on-access real-time scanner; you must manually scan a file in order to detect malware.

ClamWin Portable is a portable wrapper for ClamWin and can be modified to automatically update virus database periodically or during startup.


System Requirements: WinXP / Vista / Win7 / Win8 / Win10
Writes settings to: Application folder
Stealth: ? Yes
Unicode support: No
License: GNU GPL
How to extract: Download the self-extracting EXE and extract to a folder of your choice. Launch ClamWinPortable.exe.
What's new? See:

33 comments on ClamWin Portable  The Portable Freeware Collection Latest Entries Feed

a 2006-10-29 14:08

If you use this inconjunction with winpooch you'll have yourself a free proactive virus scanner.

gulugulu 2007-01-24 01:31

this is not a very good antivirus failed on some viruses for me while others did the job like nod32 or etrust.

tp0lm1 2007-01-30 05:12

agreed. the app is not good enough. too slow and also the virus base is not full.

Adam 2007-01-31 04:24

as the website states, it's opensource, and updated by, if you notice something that isn't detected, tell them about it; it only makes the project better.

I'm glad it doesn't rely on hueristics that other engines rely on; results in waaaaaaayyy too many false positives and other crap, that scare the user into thinking they are actually at risk for an infection; when in reality it's just a fake file or whatever.

De 2007-03-01 14:44

I'm afraid my opinion of this is rubbish! No matter what version I use (since Nov '06) I have NEVER been able to scan anything because as soon as I press the Scan button ClamWin crashes.

Zappa 2007-04-12 00:50

Since updating from V0.90 to V0.90.1.1 I've problems to update the signatures. I get a messege that main db is up to date but getting the daily on ALL servers fails!

Kenny 2007-04-12 04:54

Hey guys! It's a FREEWARE antivirus! Please be more compressive... You can't comparate it with Nod, Kaspersky, etc...
Just try it if you need it, if not, keep using Nod ;)

Mack 2007-05-05 10:43

I use it on my thumb drive when traveling + At home use it as part of Spyware Terminator.

Jason 2007-05-10 07:46

I agree that it may not be as good as some of the other virus scanners. I use it as a great portable tool to analyze customer pc's as an initial sweep. I then get them started with the other installed programs.

Keep up the great work on the site. I direct many of my students this way every semester.

USBman 2007-06-03 14:36

Regarding auto-updates of the virus definitions, there are some good postings at the forums.

Specifically: for constantly keeping your definitions up to date (re: ClamWinPortableDBUpdate) points out that if you don't need your definitions CONSTANTLY up to date, you can simply create a batch file with the following, in order to make ClamWin update before launch:

"start /wait ClamWinPortable.exe --mode=update
start ClamWinPortable.exe"

(note that the original forum has the WRONG name for the executable, use the above text instead)

USBman 2007-06-03 16:22


you can make the update window automatically close upon completion if you instead put the following in the batch file:

"start /wait ClamWinPortable.exe --mode=update --close
start ClamWinPortable.exe"

That might be more helpful, as you don't then have to wait for the definition update to complete and then press "close."

kiwichick 2007-06-04 00:57

I have been trying since version 0.88.5 and I still can't get the program to work because "ClamWin Antivirus has encountered a problem and needs to close". I have tried it on 3 different computers and about 7 different hard drives and the result is still the same. I can't get anyone at the ClamWin Portable forum to comment on my problem so maybe someone here will.

Local 2007-07-26 11:40

I can't say how good the protection is for this is.
It's never picked up a virus upon my pc, but then again neither has norton mcafee or avg.

Two problems I have with it though is it's getting HUGE.
I've had to take it off one of my usb sticks because there was no room for the definitions.

Also it's soooooooooooooooooooooo slow.
I left it to scan my laptop, came back hours later and there it was still halfway trough my i386 folder.

It seems well put together and the volunteers eady to help but at this speed I'm looking for something else.

Simon.T 2007-10-30 19:33
MiDoJo 2008-01-17 18:30

Vista Compatible (Vista Ultimate) no UAC warnings.
Portable DB Updater also works but does have UAC Warnings

Mark 2008-02-21 19:32

Great Open Source app, but a damm shame its so slow!

Cyberish 2008-05-06 15:52

I'm unable to load the preference dialog box, which makes scanning take forever.

Vhati 2008-06-25 08:58

It's always worked well for me. I use it on a write-protected USB stick when diagnosing systems.
Definitely better than Symantec or AVG in that it doesn't quarantine USEFUL tools like netcat.

SomeGuy 2008-08-06 13:08

It is slow, but it is open source and i have heard it is based on AVG, because of this, there will be less bugs and you know that what you downloaded isnt a virus itself because you can see its source

a 2008-08-25 15:12


It's based on ClamAV, hence the name "ClamWin"

nhat truong 2009-08-17 08:07

this is not a very good antivirus failed on some viruses for me while others did the job like nod32 or etrust
tuyen dung | viec lam | tim viec

portFreeUser 2010-01-28 14:52

This program suits my needs for something I can run if I sense a problem and otherwise just have available but not running (to save CPU and RAM use). The only warning I have is to not enable automatic quarantine of infected files. This could render your computer non-functional if system files are auto-quarantined. While this might be desired in some circumstances, probably the average user would prefer not to reboot into a broken-down and therefore locked system.

Simply turning this option off means that you can still discover malware infections and then deal with cleaning them up manually after you find out how bad the infection is. This is a preferred type of approach in this modern age of false positives.

ClamWin is nice though. I like the simple interface and ability to exclude certain media playback filetypes that might be considered to large and not dangerous enough to need to scan.

I like how it doesn't install a bunch of strange background processes.

Thanks to the author of this program and for keeping it up to date.

carbonize 2010-08-13 09:29

Whilst it hasn't got the best detection rate of all the anti virus programs it is one I always have with me on my USB stick for dealing with infected machines.

Silki Garg 2010-09-26 15:13

Here is a nice list and review of a few Portable Antivirus Software, which are freeware to use.

Rodny 2011-02-17 16:31

Does it still have that atrocious UI? I know it's free and all but that is what has been keeping me from using it - besides the scan speeds. That was back in '06, they had more than enough time to make a few improvements.


Danix 2011-07-13 16:44

If you wish to report it as an alternative, is available also a X-ClamWin winPenPack version here Thank you! ;)


Checker 2011-07-13 18:12

@ Danix: Thanks ... and updated.


jonezrin 2012-05-09 11:06

Add real-time malware scanning capabilities to ClamWin Portable by also using Clam Sentinel.


Midas 2012-06-30 21:45

If you're running ClamWin portable and want to use 'freshclam.exe' to update via CLI, it won't work unless you place the following lines into (a newly created text file alongside the exe named) 'freshclam.conf':

DatabaseDirectory ..\db
UpdateLogFile ..\log\ClamUpdateLog.txt
LogVerbose yes
NotifyClamd .\ClamWin.conf
Foreground yes



Beeber 2013-09-30 23:24

I just clicked the link 'ClamWinPortableDBUpdate', and it had nothing to do with updates...more like a meat market that refuses to let you leave...


MKonar 2014-07-20 18:19

An update on ClamWinPortableDBUpdate: has been repaired. :-)

You can get to the ClamWinPortableDBUpdate website through either of the following links:
* (which now forwards to)

If anyone here wants to take over maintanence of ClamWinPortableDBUpdate, please send me a message. I no longer use Windows and so no longer maintain it.


JohnyZlo 2015-03-01 11:04

ClamWin v0.98.6 released:

This release updates ClamAV scanning engine to the latest version and brings following improvements:
* Bug fixes in detection of files produced by upx, upack and mew packagers
* Other bug fixes and feature improvements

Download the latest version here:


Midas 2015-05-16 21:13

Please note that, for updating purposes, you needn't download the full 100MB+ ClamWin package.

Just go to, find the latest version folder and download the clamwin-0.9x.x-setup-nodb.exe, which is only about 8MB -- after (Uni)extracting, you'll find all the files you need for updating in the '{app}\bin' folder...


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