Hi,
Accessing Safe Mode using F8 function key can be tricky. You need to continuously tap the key not just long press it, doing this takes a lot of practice. One way of activating Safe Mode from Normal Mode is to click the Start button, go to Control Panel, then Run, type msconfig and hit Enter. Select the Boot tab and check the box before Safe Boot. After that, click on Apply and OK.
To go back to Normal Mode, uncheck Safe Boot then click on Apply and OK.
Let us know if you have other concerns.