BleepingComputer.com: multiple rundll32.exe process/computer beeps every hour

We have multiple machines running Windows XP, both service pack 2 and 3, that beep multiple times every hour and multiple rundll32.ese files show up in Processes. These rundlls take up around 5k of memory each, and with 30 or 40 running, that drastically slows down our machines. I have run our VIPRE anti-virus, as well as Malware Bytes and Lavasoft Adaware. Everything comes up clean. I have run the Process Explorer to determine what is running the file. The command line shows rundll32.exe tlfueu.yzb,kkmrm

the tlfueu.yxb was a Confiker file that was supposedly deleted by our virus software and other Conficker removal tools show that the machine does not have Conficker.

Not sure how to stop this.

1) If I were you I'd uninstall AdAware. It's very old school and MalwareBytes and / or Super AntiSpyware are the current best of breed
2) Also if I were you, I'd post in the Am I Infected forum on this site - because your system most certainly is infected.