Error 1330: cab13.cab has an invalid digital signature
Your may have this kind of problem when you are installing the Microsoft Visual studio 2010. I was very frustrated and annoyed.
Finally, I found where the error occurring. Actually, the problems was on RAM.
Normally, if there has a problem on RAM, window will not be loaded. but this time window loading is fine. but when you install microsoft product or some othere software which has bigger file size. then intallation will be craped on the middle.
when you are faced this problem, don't forget to run memory diagnostic tools under the control panel.
if you found the errors on them, then change the RAM.
Window 7 has memory diagnostic tools. if not downlaod here http://download.cnet.com/Memory-Diagnostic/3000-2094_4-10629429.html