Tigerlily, You can not find your system32 because it is a hidden folder. In the first thread by kc0rkx_finch is mentioned the following:

3)Open My Computer. Select Tools from the menu, followed by Folder Options. Click on the View tab. Make sure that there is a check mark next to the following items:

Display the Contents of System Folders
Show Hidden Files and Folder

4)Now, make sure there are no checkmarks beside the following:
Hide protected Operating System Files.

Did you do those steps also?

The missing regedit.exe i can not explain but try and search your pc for the file (If you allready didn't do that, that is).

For TrendMicro: I don't understand. I have an ADSL connection and installing the files for TrendMicro didn't take all to long. And i completely don't understand the WORM story. Where did you go to to download TrendMicro??? And how did you find out a WORM was attached?

grtz