One yr ago I bought a new HP laptop, dv6375 160GB hard drive, 2 GB memory, w/ Windows Vista home premium. I went to www.apple.com to download Itunes and Quicktime, because I want Itunes on this computer. When I try to download, it starts downloading, and I watch the bar, showing download progress. About halfway through the download, the bar freezes, and it will not continue, nor complete the download. Any suggestions ?