Prevx is flagging jsproxy.dll as Medium Risk Malware. But, it can't remove it! I get the instructions to disconnect from the Internet and reboot the computer, and Prevx does another scan upon rebooting -- and keeps reporting the same files. jsproxy.dll in c:\windows\system32 jsproxy.dll in c:\windows\softwaredistribution\download\(a registry key) This last folder seems to be from the last Windows update (I run XP SP2.) It contains subfolders called backup,sp2gdr,sp2qfe,sp3gdr,sp3qfe,and update. There's a spuninst.exe file in each, which certainly looks like the Windows update uninstall program. And, I ran the Windows update over a week ago, but Prevx is suddenly flagging the file as of today (10/17.) According to my research, jsproxy.dll is a Microsoft program: http://www.bleepingcomputer.com/filedb/jsproxy.dll-1228.html If I select the file properties, I get: File version 6.0.2900.3627 Description: JScript Proxy Auto-Configuration Copyright: © Microsoft Corporation. All rights reserved.