the signature of this program is corrupt or invalid

Hi Sean,

Thank you for visiting Microsoft Community and posting your query.

I understand that you are unable to download any program using Internet Explorer.

Let us try fixing this issue by following the methods given below, before we proceed please provide the required information.

1)      Are you using Internet Explorer to download programs?

2)      Do you remember making any changes prior to this iisue?

I would suggest you to follow the methods given below and check if the issue persists.

Method 1: Disable software with invalid signature to run in Internet Explorer

a)      Open Internet Explorer browser from Desktop.

b)      From the menu bar select Tools Select Internet Options.

c)      In the Internet Options window, select Advanced tab.

d)      Scroll down and un-check the Allow software to run or install even if the signature is invalid

e)      Click OK to save the settings. Then close the Internet Options window.

If the issue persists, try resetting the Internet Explorer and check if the issue persists.

Method 2: Reset the Internet Explorer.

Click the link and follow the steps “How to reset Internet Explorer settings”

http://support.microsoft.com/kb/923737?wa=wsignin1.0

Disclaimer: The Reset Internet Explorer Settings feature might reset security settings or privacy settings that you added to the list of Trusted Sites. The Reset Internet Explorer Settings feature might also reset parental control settings. We recommend that you note these sites before you use the Reset Internet Explorer Settings feature.

Hope the information helps to fix the issue you had in downloading programs. If you have any further queries, or any queries related to Windows, feel free to post. We will be glad to assist.

Hi Sean,

Thank you for your reply.

Are you using any third party securuty software?

If yes, I would suggest you to disble the third party security program and check if it helps.

Follow the steps given below.

Disable third-party Security Software

a)      On your Computer screen Task Bar next to System Clock.

b)      You will see the third-party Security Software Icon.

c)      Click on the third-party Security Software Icon, you will see a pop up.

d)      In that pop and select the option to disable, click on it.

Now the third-party Security Software will be disabled.

Important Note: Antivirus software can help protect your computer against viruses and other security threats. In most cases, you shouldn't disable your antivirus software. If you have to temporarily disable it to install other software, you should re-enable it as soon as you're done. If you're connected to the Internet or a network while your antivirus software is disabled, your computer is vulnerable to attacks.

Hope this helps, if you have any further queries, keep us updated, we will be glad to assist you.