Until a few days ago I could use windows update. Now, every time that I try using it I get a message that Windows update has been updated and another window opens asking me if I want to install and run "http://v4.windowsupdate.microsoft.com/CAB/x86/unicode/iuctl.CAB?37862.6327083333
Now, normally I would say yes, as I have done every time windows update changed. The thing is in the same window, underneath the previous message it says that "The publisher cannnot be determined due to problems below: Authenticode signature not found" Obviously this is strange since it is a microsoft thing, this is why I hesitate installing it. Of course without it windows update is not functioning.