The most recent build number of the Microsoft JVM is 3810. The previous version was 3805. There is a mention of MS VirtualMachine version 3812 that only provides a hotfix to the MS JVM to make itcompatible with DST 2007 (daylight saving time 2007) rules. The 3810 Microsoft VM includes a fix for securityvulnerability with ByteCode Verifier component of the MS Java Virtual Machine, that does not correctly block some malicious Java applets. Also you can update previous versions of the MS VM to Build 3810by installing the Microsoft 816093 critical update. Virutal Machine Download microsoft vm java