I upgraded my laptop, Sony Vaio E series, to Windows 10 from Windows 7. After this, the driver for touchpad was not configured. However, the basic cursor movement and clicks worked. I tried installing Synaptics Pointing device driver. Unfortunately, it didn't bring out any changes. So I installed Alps pointing device driver, which was previously the suitable driver for the device. Now, due to the fact that two drivers installed for the same device, there was a conflict, it wanted me to restart. After restarting, specifically, after Windows loading, keyboard and touchpad didn't work. I couldn't understand what a mouse driver can cause harm to keyboard. Please help me with this. I couldn't even login for further to troubleshoot. What can I do further?