I wondered if anyone could kindly help me out with a query.

I have found a file on my C: drive with a name of ~ (tilde character) - I looked inside using quickview and found lots of odd characters plus email addresses from my outlook address
book. Can any one tell me what this file is - I may be being a bit paranoid but I thought it may be a security issue. I hope I am not wasting your time posting this question here but I was not sure where else to get help. I have searched for some time but have no success. Thank you in advance for any help you can give.