Being serious; do you have any nudey pics or flicks on yer HD? Any ‘holiday’ snaps of the other half?
Because anyone who checks out your machine, will be able to view them. If you don’t want this happening, either be right with them, when they are doing the work, or remove the HD, stick it in an external HD ‘caddy’, and take all the ‘private’ stuff off, first. Bear in mind that your internets history can reveal your ‘browsing patterns’, too.
Not for a moment suggesting that you use your PC to look at disgusting filth/distribute terrorist material, but I’ve known one or two people who’ve been a little embarrassed, following similar cases, so be warned!
Don’t keep owt naughty on your HD, store on disc/memory stick instead, and delete yer internet cache/cookies/history.