>>If you run the latest version, this one should be cleaned on the first run. You may want to report that to them.
>
>Ok. I'll try that. Tks.

Hi download and run the following tool from Symantec website. Please read the procedure carefully before performing the test.

One more thing riched20.dll is a microsoft office file and you may require to restore from your original installation disk. Please read more on this at Symantec site.

http://securityresponse.symantec.com/avcenter/venc/data/w32.nimda.e@mm.removal.tool.html

HTH