JS.Nimda is easy to handle, it is not destructive, my computer was infected last week, and I went online and download a program, ran it, everything is fine now. don't know worm.concept.57344.e
actually you can go to google.com, do a search to find out solution. there must be a program free to download. hope this helps and good luck.
URGENT!!!URGENT!电脑感染上了病毒！发现JS.Nimda and worm.concept.57344.e 杀完后，restart 电脑，但又发现病毒！有啥解决方法吗？（今天早上刚 format的！）