You could unplug the hard drive and complete the operation using a Linux live USB or cd. Even then you are probably at risk of exceedingly clever exploits that

You could unplug the hard drive and complete the operation using a Linux live USB or cd. Even then you are probably at risk of exceedingly clever exploits that can live in the bios. I would say that generally the answer is no. If you plug a physical device into your computer you should assume that it's at least possible it can do things you would not like very much.