Anyway, onto the topic... What software are you using to record? (And does it do it with other recording software aswell?) Does it also happen if you use a hotkey (keyboard keys) to stop the recording?
about the recording software: i'm using Bandicam to record and i'm haven't tested with another recorder about the hotkey: i haven't tested (because i'm on a vacation). maybe i'll test it when i'm go back home
about the os: i'm using win7 ultimate with the latest update. about the cpu: i'm using intel pentium dual core e2160. i don't think that's incompatible with bandicam