I bought McAfee Total Protection 2012 and installed it on my Windows Vista 32 bit. I got myself a new laptop with Windows 7, and wanted to network (wireless) the two computers together. Both can see each other, both can get on the Internet. From the Vista, I can view the shared files and folders on the windows 7. From the window 7 I cannot view any files or folders on the vista. Every time I try to change a sharing setting in the "Network and Sharing Center" I get the message "The specified service does not exist as an installed service". My Windows security center is OFF and I cannot turn it on. My windows Defender is OFF and I cannot it on either. Can I please get some advice on this problem? Thank You.