Add the following two lines to the end of your hosts file.

128.95.160.156 boinc-files.bakerlab.org
128.95.160.156 bwsrv1.bakerlab.org

The file might be *hidden, system and/ or read only* and is located as noted below (Change all the / to ).

C:/Windows/System32/Drivers/etc/hosts

You might need to disable anti-virus and/or anti-malware software (Norton's, Microsoft's built-in Anti-virus; etc; temporarily to edit it.

*To change the file attributes, open a "DOS prompt" command line "C:>" and type (without the quotes)
"Attrib -h -s -r C:/Windows/System32/Drivers/etc/hosts"

Now to edit the file.. At the same command prompt type (without the quotes)
"Notepad C:/Windows/System32/Drivers/etc/hosts"

Or Use a text editor such as NOTEPAD.exe to edit the file, save it with "all extensions *.*" as plain text.

I found nothing labelled DOS prompt. I found what appears to be the hosts file and edited it it to add the lines. I found nothing to make the changes take effect, so I rebooted the computer. Still no signs of the changes taking effect.