With the Snoopers Charter coming soon in the UK, I intend to start using a VPN service. Disregarding issues of the VPN logging user details or leaving my IP address discoverable, what other potential personal information leaks should I be aware of? For instance, websites take a machine ID, package and sell it on. What would using a VPN do to protect against, say Google matching my machine ID when not using the VPN (they have this ID now) with my VPN-enabled sessions? Or would it be the machine ID of the VPN server that is collected? If I don't use the VPN before and during all online activity, can I be matched and identified using browser persistent storage? Would I have to track down and eliminate all persistent storage and cookies before the first time I use the VPN? Is P2P secured? Is Usenet secured? Should I quit the VPN before signing in to webmail or any other subscribed website? I assume I will have to kill my Windows logon and switch to a local-only account. Currently my ISP uses IPV4 and dynamic IP allocation. I won't use TOR - it is way too slow.