My son, who lives in a distant city, had trouble with his computer and brought it to me for repairs. After replacing the graphics card and doing a fresh install of Windows XP Home SP3 and Microsoft Office Pro 2010 on a new hard drive, I purchased and installed Kaspersky Internet Security 2013. Everything seemed to be okay, and so I set it aside waiting for him to come and get it, and I only start it up after (I see on my own computer that) windows or java or flash player updates have been issued. After installing the latest Windows updates on my own computer, I fired his computer up and to install updates. I found that the 'Updates Available' icon had not come up on his machine, and when I went to manually check for/install Windows Updates, I couldn't get past the Microsoft screen that says 'Checking if your computer has the latest version of Windows updating software for use with this website...' I did some checking and found that Kaspersky IS is blocking the update operation and causing Internet Explorer to become non-responsive. If I pause Kaspersky protection from the right click menu or disable protection on General Settings and try again, the browser goes quickly to the update website, checks for the proper software, and proceeds to list any updates available. Disabling only the firewall portion of Kaspersky from the settings menu makes no difference. I've asked Kaspersky support for assistance but have had no response. If anyone can help, I would appreciate it. I have six retail licenses for this product and am beginning to wonder if I made a mistake in buying them.