# Step 1: Check your passwords. If you have an administrator account with an easily guessed password, change it. Microsoft provides a guide to strong passwords that includes a link to the company's online password checker. If somebody other than you controls your computer's admin password, make sure that person understands the gravity of this situation.

# Step 2: Make sure you've installed the patch described in MS08-067. Open Control Panel's Add or Remove Programs list to ensure that KB 958644 has been installed. Click Start (plus Run in XP), type appwiz.cpl, and press Enter. In XP, make sure Show updates at the top of the window is checked. In Vista, click View installed updates on the left to see all of your PC's patches.

The update in question was probably installed in late October or November of last year; look for Security Update for Microsoft Windows (KB958644). If this patch isn't installed, browse to Microsoft's Download Center to retrieve and install it. If your PC is blocked from visiting this site, use a noninfected PC to download the patch to a removable medium and install the update on the wormed PC from that device.

# Step 3: Run Microsoft's Malicious Software Removal Tool (MSRT). The latest version of this Microsoft tool identifies and removes all of the Conficker variants I've heard about. The easiest way to get MSRT is through Windows Update, but if you can't get through to that service on the infected PC, borrow a computer and download the tool from Microsoft's site.

# Step 4: Disable AutoPlay. Simply stated, you don't need AutoPlay that much. Follow the advice in Scott Dunn's Top Story from the Nov. 8, 2007, issue for comprehensive instructions to disable AutoPlay.