Whenever I try to download the virus database, the following messages appear:

ClamAV update process started at Wed Sep 21 15:25:00 2011
nonblock_connect: giving up due to excessive bogus loops
Can't connect to port 80 of host database.clamav.net (IP: 211.239.150.206)
Trying host database.clamav.net (219.94.128.99)...
WARNING: getfile: Unknown response from remote server (IP: 219.94.128.99)
WARNING: Can't download main.cvd from database.clamav.net
Trying again in 5 secs...
ClamAV update process started at Wed Sep 21 15:25:44 2011
nonblock_connect: giving up due to excessive bogus loops
Can't connect to port 80 of host database.clamav.net (IP: 211.239.150.206)
Downloading main.cvd [100%]
ERROR: Verification: Can't verify database integrity
Trying again in 5 secs...
ClamAV update process started at Wed Sep 21 15:27:38 2011
nonblock_connect: giving up due to excessive bogus loops
Can't connect to port 80 of host database.clamav.net (IP: 211.239.150.206)
Downloading main.cvd [100%]
ERROR: Verification: Can't verify database integrity
Giving up on database.clamav.net...
Update failed. Your network may be down or none of the mirrors listed in c:\docume~1\user\locals~1\temp\tmpn3om3r is working. Check https://www.clamav.net/support/mirror-problem for possible reasons.

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Completed
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I haven't been able to use ClamAV since installation. Is it because of wrong proxy settings? If so how do I instruct the Antivirus to use the right proxy? Please help.

If you use a proxy to contact the internet, there is a ClamWin proxy configuration tab you need to bring up and fill out. You can probably get the information needed from your provider.

If this doesn't apply to you, you might try deleting all files in the ClamWin database folder and then do a manual update. That often fixes things.

Regards,

I am having exactly the same problem, with ClaimWin 0.97.2 and XP. After installing the program, updates worked between Sept 19 and Sept 24. Starting Sept 25 all updating attempts failed:


ClamAV update process started at Sun Sep 25 19:11:10 2011
main.cvd is up to date (version: 53, sigs: 846214, f-level: 53, builder: sven)
WARNING: getfile: Unknown response from remote server (IP: 193.206.139.37)
WARNING: getpatch: Can't download daily-13666.cdiff from database.clamav.net
WARNING: getfile: Unknown response from remote server (IP: 195.22.205.162)
WARNING: getpatch: Can't download daily-13666.cdiff from database.clamav.net
WARNING: getfile: Unknown response from remote server (IP: 213.92.8.5)
WARNING: getpatch: Can't download daily-13666.cdiff from database.clamav.net
WARNING: Incremental update failed, trying to download daily.cvd
WARNING: Can't download daily.cvd from database.clamav.net
Trying again in 5 secs...
....
....

Trying again in 5 secs...
ClamAV update process started at Tue Sep 27 16:00:29 2011
main.cvd is up to date (version: 53, sigs: 846214, f-level: 53, builder: sven)
WARNING: getpatch: Can't download daily-13666.cdiff from database.clamav.net
WARNING: getpatch: Can't download daily-13666.cdiff from database.clamav.net
ERROR: getpatch: Can't download daily-13666.cdiff from database.clamav.net
WARNING: Incremental update failed, trying to download daily.cvd
ERROR: Can't download daily.cvd from database.clamav.net
Giving up on database.clamav.net...
Update failed. Your network may be down or none of the mirrors listed in f:\docume~1\admini~1\locals~1\temp\tmppkztba is working. Check https://www.clamav.net/support/mirror-problem for possible reasons.

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But internet works fine for all other purposes ....

I don't know if this is related, but I did some Googling, and there were some reports of DNS problems around Sept. 25th. Other than that, all I can suggest is to make sure internet updates are enabled, ClamWin is enabled in firewall, any changes needed to new router/isp, ClamWin configured for proxy if applicable, and check hosts file to make sure ClamWin isn't resolved to local machine.

Regards,

Facing the same problem during database update.