Michelle,
I don't believe your issue would be that the laptop is company owned, but rather whether the laptop is perhaps configured in a way that would prevent or interfere with you accessing the exam. I'm a great many cases, companies limit their employees' ability to install or run software, or to visit particular websites. In addition, anti-malware and anti-virus software could be an issue. In any case, I doubt anyone else's experience would necessarily be of any assurance to you in your situation.
In any case, best of luck on the exam!
Regards,
Tracy