You can't directly boot into Windows 8's Safe Mode; you can only reboot into it. Here's how to get around that using a key drive.
The old F8 trick no longer works with all PCs. Here are some alternate ways to enter Windows's clean, diagnostic Safe Mode
Is an app on the fritz? Fixing the problem may be only a few taps away.
You plug a USB device into your PC's USB port…and nothing happens. Now what?
The touchpad built into your laptop no longer responds to your fingers. Here's what to do about it.