That is proof-of-proxy, i.e. you. Whether you can be trusted with that is debatable for each individual. I'd prefer cryptography over trust. Anyhow, the password problem with Windows can be semi-easily mitigated and thus voids the excuse.
Yah, I don't use windows but you should just be able to put a linux distro on a usb, boot from that usb, mount the harddrive, read all the data you want to read.