Everything working fine with Prevx untill now...
A little bit more information:
Prevx Home protects three main areas:
Memory Protection
Memory protection prevents against buffer overflow attacks, and because different programs behave differently, several different security settings are provided.
File System Protection
File system protection is designed to prevent attackers from accessing your computer's file system, but still allowing legitimate programs to continue normally. Attackers are prevented from installing malicious code on to your computer and stop legitimate programs from being hijacked. For example, Prevx Home will stop unauthorized modification of important system files, such as Autoexec.bat.
Registry
The registry is a key component of Windows. Making changes to the registry can allow an attacker to modify system behavior, cause programs to behave in unusual ways, not to load, allow malicious code to be automatically run, and so on. Numerous security settings are provided to protect the Registry from such unauthorized changes, but ensuring normal access by legitimate programs are not affected.
For each of these areas a number of security settings are available, and when combined, provide comprehensive protection.
Most attacks will violate multiple security settings and in more than one area. Prevx Home provides robust protection through applying multiple security settings in a layered security model. This means that if an attack is not caught by one security setting, it is caught by another.