From the first detection related to JAVA and it is likely to be because you haven't got the latest version of JAVA, vulnerabilities being exploited.
Ensure you have the latest version of JRE (JAVA Runtime Environment) because older versions can be vulnerable to malware. First remove All Older Versions From Add/Remove Programs.
Then get the latest update from here
http://java.sun.com/javase/downloads/index.jspOr JRE version 6 update 12
http://www.majorgeeks.com/Sun_Java_Runtime_Environment_d4648.htmlThe second I think need more analysis, see below.
The third and the one I was also interested in is often associated with an anti-rootkit scanner called GMER or a tool called combofix, but I don't believe they would be located in that folder. Can you recall ever using GMER anti-rootkit or Combofix ?
A google search for the file name and location,
http://www.google.com/search?q=C%3A\WINDOWS\catchme.exe, returns some hits that tend to indicate it being associated with a trojan so the detection looks good, though you could also check that out with virustotal and report the findings if you wish.
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You could also check the offending/suspect file at:
VirusTotal - Multi engine on-line virus scanner and
report the findings here the URL in the Address bar of the VT results page.
You can't do this with the file securely in the chest, you need to extract it to a temporary (not original) location first, see below.
Create a folder called Suspect in the C:\ drive, e.g. C:\Suspect. Now exclude that folder in the
Standard Shield, Customize, Advanced, Add, type (or copy and paste) C:\Suspect\* That will stop the standard shield scanning any file you put in that folder. You should now be able to export any file in the chest to this folder and upload it to VirusTotal without avast alerting.