Aspire 5100 is not responding in 8.1 lock screen after Update 1. Can`t acces Bios

Bog185
Bog185 Member Posts: 1 New User
Hi, I instaled w8.1 on my old Aspire 5100 (Hdd 80Gb, 2Gb Ddr2, 1,6GHz Atlon x64) and evrything was fine until Spring Update1. After this update, it is boot Windows to lock screen, but i can` t do anything... Also i can`t acces Bios. (the keyboard seems to be inresponsable, the mice also inresponable, and another keyboard in kb slot also, and usb kb also....) the time on lock screen is ok. I want to install another SO like W7/ Mint but I can`t force Bios to boot from usb key. What can I do? Thanks.
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