Try the download from but disable or uninstall any 3rd party antivirus program first.

I used a wired connection for the download/install.

I've recently upgraded a Win 7 laptop from scratch using that link.

When it comes to selecting the type of install, select Custom and then you can turn off the bits you don't want such as the P2P option of MS using your bandwidth to send others their updates as well as any info gathering options.