Question：
I have been having trouble with installing all downloads, but the most important of these to me is itunes and quicktime, everything I try to install says that the
program does not have a valid digital signature, I have done some research and found that this would not normally be a problem becuase you can just ignore
it and install the program. this is not the cases as it seems for my computer in which if the digital signature is invalid I can't install the program. this has been
going on for a couple months now and it seems to be only affecting recently updated softwares.
Answer 1：
I have been having trouble with installing all downloads, but the most important of these to me is itunes and quicktime, everything I try to install says that the
program does not have a valid digital signature, I have done some research and found that this would not normally be a problem becuase you can just ignore
it and install the program. this is not the cases as it seems for my computer in which if the digital signature is invalid I can't install the program. this has been
going on for a couple months now and it seems to be only affecting recently updated softwares.
Answer 2：
Hello JFINK,
Thank you for visiting the Microsoft Windows Vista Community site.
Just for your understanding, the definition of a digital signature is below.
What is a digital signature?
I suggest you ensure the virus-scanning program is up to date, if you do not have one try Windows Live OneCare. Then try to do the install.
Let us know if these steps resolve your problem. I hope the information is useful.
Regards,
Anthony
Microsoft Answers Support Engineer
Visit our Microsoft Answers Feedback Forum and let us know what you think.
Answer 3：
Hello Anthony,
Thanks for the information and suggestion. I have updated my security as best as I could and attempted to install Windows Live OneCare, however my
computer is not allowing me to install anything. This is stopping me from installing my security updates, Windows Live OneCare and my music programs. Why
this is happening I am not sure, what would you suggest?
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