I had the Same Issue After using Toshiba Utility to update bios......Computer Locking up booting to windows....
I fixed the issue like this:
1 Power Off
2 Hold F2 key and Power On
3 Computer enters Bios.....
4 Arrow over to Advanced Settings
5 Select Restore to Default
6 Save and Exit-----As Computer Reboots Hold down F1 Key
7 When Boot Options appear , Arrow to Safe Mode without Networking
8 If Computer Boots to Safe Mode Select Restart and Computer Should Boot Normal