If you are having trouble unzipping your restore on Windows, you may want to try using Info-Zip:
1. Download info-zip from ftp://ftp.info-zip.org/pub/infozip/win32/unz600xn.exe
2. Create a new folder and place info-zip in the folder. Then double click to unpack the files.
3. Drag and drop your restore zip on to the "unzip.exe" program. It will auto-launch and begin unzipping in the location of your restore zip.