If you can't do a system restore maybe you can do a system recovery. BE AWARE
: you need to back up all the data you don't want to lose before you start.
If this works it will bring the machine back to the point to where you first
took it out of the box.
Start with the machine off; depress the power button and immediately start
tapping the F11 key, this should bring you to the "Factory Recovery Partition"
if so just follow the prompts until it finishes. If F11 doesn't work try the F12 key.
If the first attempt to boot into the recovery center doesn't work, try it again.
Keep us informed!