Warning; under informed response!!
I'm by no means an expert on this subject but since I have had some strange things going on myself lately computer wise it is of interest to me and I have been playing around with a few things.
Try running the IP through
this. (30 day demo). It will give you a location and most likely an indication of the name of ISP being used, you can then complain to their abuse department for them to investigate the matter further.
Most IP's of home users change so will not definately point to the culprit. The ISP will however be able to check their logs to see whom the IP you have was allocated to at any specific time.
Do bear in mind that the IP could be that of a proxy server (??) that hides the true IP of the attacker.
Please be aware that I'm not sure if these are the correct terms for things or even if I'm technically correct in my comments, it is 'as far as I know' type info only!
I look forward to a more informed response from those in the know, having the errors I have most likely made here corrected and learning more on the subject.
