Hi! I am having a problem with an unauthorized computer on my network and I really hope someone can help me. There are actually 2 different ones that rotate. These are not family members and they prevent me from accessing the internet. I have tried to click on them and put them in the trash and find out more about them by clicking on properties, but I am not able to. I disabled my homegroup, but they still show up as being on my network. Is there any way I can permenantly remove these computers from my network? I do not understand how they were able to attach to my computer because I do have current anti-virus. I also tried doing a complete system restore of my computer wiping it back to factory settings and clearing everything off. I noticed that when I did that I could still see some of my previous bookmarks so these computers may be stopping me from actually clearing everything off of my computer. I am not overly technical, but I realize that this is wreaking havoc on my computer which I need for school. If someone could help; I would be very grateful. I am on Windows 7 home premium. Thank you.