Hi,
Vundo filenames vary from one PC to other. We have to use HijackThis to trace the filename of Vundo trojan.
Download HijackThis and unzip it to dedicated folder (like C:\HijackThisFolder\hijackthis.exe).
Then run it and click the button Do a System scan and save log file. HijackThis will perform a scan and saves the log file as hijackthis.log in the same folder where it is installed and it also opens the file automatically. Copy the entire contents of the file and post it here.