Virus? No single chance!

Well, not many people are lucky enough to have something other than Windows at work. Really, just a few have that pleasure. I am among the unlucky ones. But not like the others who want to protect their comp with a huge security package (anti-virus + firewall + anti-spyware etc.), I wouldn't want any. Not because I'm not aware of the security risk, it's just that those things consume quite a lot of your system resources.
Right, just don't click on any suspicious link, and don't open any suspicious attachment, I'll be fine. That's what I used to think. It had been right. Until a few weeks ago. Heh, how funny it could be when you look at the processes in your task manager and see a winzip process running there, when the only thing you're using is WinRar? :P Anyway, nice try. The virus attacked some noob in my network and found a way to my computer. It didn't live long, though. A quick search took me to this page from McAfee and a quick manual delete wiped the virus out from my comp ;)
Anyway, yes, you might have guessed, the virus was not completely wiped out. Today while browsing some local folders, I saw the files again. The virus was not active, of course. But I would prefer wiping out all the infected files. Thus the following solution in Java:

import java.io.File;
import java.io.RandomAccessFile;
import java.security.MessageDigest;
import java.util.Hashtable;

public class Scanner {
 
 private Hashtable hash;
 
 public Scanner() {
  
  hash = new Hashtable();
  hash.put("WinZip_Tmp.exe", "165b15075a22b0825f286f8f2de8cf71");
  hash.put("Temp.Htt", "ea7d7bd6eece99eb35daa1e5f1decd60");
  hash.put("desktop.ini", "c06c6123a8d3723eeefe8ed813b0658d");
  
 } // end constructor
 
 public static String md5(File f) {
  
  try {
   
   MessageDigest md = MessageDigest.getInstance("MD5");
   RandomAccessFile r = new RandomAccessFile(f, "r");
   byte[] b = new byte[(int)r.length()];
   md.update(b);
   b = md.digest();
   StringBuffer hexString = new StringBuffer();
   for (int i = 0; i < b.length; i++)
    hexString.append(Integer.toHexString((b[i] & 0xFF) | 0x100).substring(1));
   return hexString.toString();
   
  } catch (Exception e) {
   
   return null;
   
  } // end try catch
  
 } // end md5
 
 public void scan(File f) {
  
  File[] files = f.listFiles();
  if (files == null) return;
  for (File file : files) {
   
   if (file.isDirectory()) scan(file);
   else {
    
    String s = file.getName();
    if (hash.containsKey(s) && hash.get(s).equals(md5(file))) {
     
     if (file.delete())
      System.out.println("Successfully deleted: " + file.getAbsolutePath());
     else
      System.out.println("Failed: " + file.getAbsolutePath());
      
    } // end if
    
   } // end if else
   
  } // end for
  
 } // end scan
 
 public static void main(String[] args) {
  
  String pathname = args.length > 0 ? args[0] : "./";
  File f = new File(pathname);
  Scanner s = new Scanner();
  s.scan(f);
  
 } // end main
 
} // end class

The code might be extendable to create a complete anti-virus engine. But you know, I'm too lazy. So if you're interested in completing the job, please do it and let me know ;)
And no, I'm not installing any anti-virus software on my comp. I wouldn't need one ;)