Starting your Windows 7 computer in Safe mode is a handy way to troubleshoot issues with programs and drivers that can prevent Windows 7 from launching successfully.
Safe modes launches Windows with a default set of files and device drivers, and doesn’t load start-up programs. This means you can quickly see if the issue lies with a recently installed program or driver and remove whatever is causing the problem.
Start Windows 7 in Safe mode
Step 1 Remove all CDs, DVDs and USB drives from your PC. Click Start, then click the arrow next to Shut Down, and then click Restart.
Step 2 Press and hold the F8 key on your keyboard as your computer restarts. Do this until the Windows logo appears on screen.
Step 3 The Advanced Boot Options screen appears. Using the arrow keys on the keyboard select Safe Mode, and then press Enter.
Step 4 Log on to your computer with an administrator account.
Windows will launch and you’ll see the words Safe Mode in the corners of your screen. In this mode, you can remove problem programs or drivers that you’ve recently installed or disable recently added start-up programs. To exit safe mode, simply restart your computer and let Windows start normally.