How do I boot into Safe Mode?

If you are fighting a virus/malware on your computer, it is best to boot in safe mode before you start removing things and running scans.  If you don’t, it is likely that the malware will likely just re-install itself.  I’m not going to go into a whole tutorial on virus fighting (maybe in a future post) but the basics are as follows:

1) As soon as you notice you are infected, unplug your internet connection or turn off your wireless.  This will prevent the infection from spreading, and will isolate the offending program from its source.

2) Boot into Safe Mode

3) Run your favorite antivirus/anti-malware program.

This post is really about Safe Mode – how do you get there?  There are a couple of ways depending on the operating system you are using.  Here’s the Microsoft Page on the topic.

Windows XP

If XP is the only operating system installed on your computer, boot into Safe Mode with these instructions.

• If the computer is running, shut down Windows, and then turn off the power
• Wait 30 seconds, and then turn the computer on.
• Start tapping the F8 key. The Windows Advanced Options Menu appears. If you begin tapping the F8 key too soon, some computers display a “keyboard error” message.  If this happens, resstart the computer and try again.
• Ensure that the Safe mode option is selected.  If you are trying to clean a machine that is virus laden, choose Safe Mode Without Networking.
• Press Enter. The computer then begins to start in Safe mode.
• When you are finished with all troubleshooting, close all programs and restart the computer as you normally would.

If you don’t want to bother with function keys, you can use the System Configuration Utility method.

• Close all open programs.
• Click Start, Run and type MSCONFIG in the box and click OK
• The System Configuration Utility appears, On the BOOT.INI tab, Check the “/SAFEBOOT” option, and then click OK and Restart your computer when prompted.
• The computer restarts in Safe mode.
• Perform the troubleshooting steps for which you are using Safe Mode.
• When you are finished with troubleshooting in Safe mode, open MSCONFIG again, on the BOOT.INI tab,  uncheck “/SAFEBOOT” and click OK to restart your computer.  THIS STEP IS CRITICAL.  If you don’t change this back, then the computer will continue to boot in Safe Mode until you do.

Windows 7

Safe Mode in Windows 7 is basically the same as XP – use F8 to get to the Safe Mode startup screen.  MSCONFIG is slightly different – Safe Mode is called Safe Boot, but otherwise the process is the same.