Hopefully you are running Win 8, 8.1, or 10 as these instruction to get into Safe Mode only apply to those versions. You have to set up Safe Mode using msconfig. My instructions will tell you how to do that. Then to power down all you have to do is hold down the power/turn-on button for about 7 seconds or so and the computer will shut off. Booting into safe mode will occur as you boot up. Here's how to get in and out of Safe Mode. <<<<< Win 10 SAFE MODE
Win 10 is a little odd because you have to go through a short process to put the computer into the Safe Mode and to get it back out of the Safe Mode. Here’s how to do both processes. This works in Win 8, Win 8.1, and Win 10.
To Get Into Safe Mode:
1. Right click at Start button
2. Click on RUN
3. In the resulting box, type in the term msconfig and hit enter.
4. The msconfig window will appear. At the top of the window click on the Boot tab.
5. In the next window put a check mark in the “Safe Boot” box.
6. Click Apply, then click OK
7. Click Restart. The computer will go through a normal looking boot and you will have to provide your password if you use one. The desktop will eventually show up with a somewhat abnormal looking Desk Top with all icons skewed left and will say SAFE MODE in all four corners of the screen.
NOTE: If you were to reboot the computer, it will boot/reboot continually into the Safe Mode until you take the steps below to change the settings for a "normal” boot up to your desktop.
To Get Out Of Safe Mode:
8. Right click at Start button
9. Click on RUN
10. In the resulting box, type in the term msconfig and hit enter.
11. The msconfig window will appear. At the top of the window click on the Boot tab.
12. UNCHECK the “Safe Boot” box.
13. Click Apply then click OK
14. Click on Restart to boot the computer into its’ normal mode.
NOTE: Once the Restart (reboot) is completed and the computer boots into the “normal” mode it will continue to boot into the normal mode each time you reboot. You are required to use the getting into the Safe Mode process(s) to get into it and out of it. >>>>> Run your antivirus and any antimalware programs you have while in the Safe Mode and allow those programs to delete any they find! Once you do that you should have a clean computer. Change the setting to get out of Safe Mode and reboot the computer normally. Hope this helps!