AVG Antivirus is reporting that xmaxima.exe is infected with a trojan horse. SHeur4.HKI
This could be a false positive but it might be also possible, that it is not a false positive.
See here the virus scan test result on jotti.org for more information to xmaxima.exe
xmaxima.exe from maxima 5.25.1
http://virusscan.jotti.org/de/scanresult/0f225d450d7c370fa3ca25db091594aeb2b358be
and xmaxima.exe from maxima 5.25.0
http://virusscan.jotti.org/de/scanresult/9d02f4b2779aef96ed327a0a8ba8b20b2ad5a96d
I tried xmaxima.exe from the maxima-5.25.0.exe and maxima-5.25.1.exe installation packages for Windows.
I also want to mention, that clicking on FAQ on http://maxima.sourceforge.net/ leads to a russian page not related to maxima
showing the message that http://maxima-project.org/ domain registration is suspended.
Closed as a duplicate of bug report #2300.