As I said the alcmtr.exe was not related to the spam.
You didn’t answer the firewall question, a firewall is an essential element of your security. The undetected trojan spambot you have may well have been downloaded by another application on your system. Without a good firewall it is hard to get clean as quickly as you get rid of something there could be more of the same downloaded.
You need to update Sun Java as you are running is out of date. Get the latest version, once you have done this, uninstall all older versions from Control Panel > Add/Remove Programs.
http://www.java.com/en/download/index.jsp
You also have some remnants of Symantec products (O23 entries), what is it or was it from symantec you had installed ?
Other than the above I don’t see anything obvious, so it may be that you have some stealthed/hidden stuff on your system.
Also see, anti-rootkit, detection, removal & protection http://www.antirootkit.com/software/index.htm.
