how do i put my toshiba laptop into safe mode

Java SE Development Kit 8 Update 5 (64-bit) 8.0.50 Here is the list of items that the System Restore said would be affected, and thus the changes made before failure: ■I've tried launching the recovery environment, and it acts like it's doing something, but then it only brings up the HDD recovery screen. These don't do anything noticeable either. ■I've tried disabling driver signature enforcement and early-launch anti-malware protection (separately, of course). ■I've tried to restart with boot logging, but it does nothing new (that I know of). ■I've run the Automatic repair in the F12 Boot Menu's Advanced Options, and it fails. The log is of no use to me because I can't get access to replacements for the corrupted files. ■I've run the System File Checker from Safe Mode and it says it could not repair some files. ■I've tried a System Refresh, but this fails and says no changes were made. At least, I can't access the Internet via WiFi and I can't find an Ethernet cable. ■I am able to boot in Safe Mode with Networking, but cannot access the Internet. ■I am able to boot in Safe Mode and do things there, such as attempting a System Restore and turning off Startup Items and Services, but these things don't help. I've tried every restore point, and all of them fail, giving an 'unspecified' error with the error code 0x8007051a. ■I've tried to do a System Restore many times.

■I've taken out the battery and held down the Power button for thirty seconds, and then reinserted the battery and restarted the computer. Here's what I've tried so far, not necessarily in chronological order: It has an AMD Dual-Core E1-1200 Accelerated Processor with AMD Radeon HD 7310 Graphics, 4 GB of DDR3 RAM, and a 320 GB HDD. My computer is a Toshiba Satellite C850D-ST3NX1 running Windows 8 64-bit. I do have access to the F12 Boot menu, and have thus tried almost everything in there (as seen in the list below). This is not exactly the same screen, but the only difference is that mine does not have the AMD image, the boot tips, or anything but 'Toshiba Leading Innovation' with the arrows and the typical Windows 8 spinning circle of dots.

How do i put my toshiba laptop into safe mode