Boot from a Linux disk (easy to make) and see how the keyboard (both internal and external) behave then.
If OK in Linux, first try System Restore, than a Windows refresh or reset back to factory conditions.
Hi guys, my keyboard is constantly turning on and off the shift key on its own in an unpredictable manner. Pressing the backspace key also activates the shift functionality.
It makes typing extremely annoying and interferes with operating windows on my laptop.
Not sure if it's the laptop hardware itself is the issue or something else like a virus etc, because the problem is replicated using an external keyboard as well.
I've ran an Microsoft Security Essentials antivirus scan and everything seems to be OK. Any help or advice will be highly appreciated. The laptop is a LEnovo Thinkpad E420, thanks.