When you try to run a program in Windows Vista which does not have a valid signature, you get a warning message:
The publisher could not be verified. Are you sure you want to run this software?

If you want to disable this annoying message from Windows Vista, here is a small tweak that you can try. But first, before the tweaking please create a system restore point, to be on the safe side. Then try this tweak:
- Open Internet Explorer > Tools > Internet Options > Security tab > Local Intranet icon > Select Sites > Click on the Advanced button > Uncheck Require Server Verification option.
- Now add the name of your your server or domain of the software, and click on Add. Your server name should be the name which appears after the ‘From’ in the Windows Security warning dialogue.
- Make sure you include the symols \\ too. Having done this, you should now see Filename//Servername in the box.
- Alternatively, to disable the security dialogue box for ALL .exe files, you can add the following key to your Windows Vista registry:
[HKEY_CURRENT_USER\Software\Microsoft\Windows\
CurrentVersion\Policies\Associations]
“LowRiskFileTypes”=”.exe
But this Windows Vista registry tweak is not advisable, as it opens up your computer to other risks.
Warning: Modifying the Windows registry can cause serious damage to your Windows Operating System.It is better to backup your Windows registry data before making any changes. Tomstricks.com is not responsible for any changes you may make to your system.
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May 7th, 2009 at 8:39 pm
This might be a stupid question but can anyone advice how to fix error code 39 on windows xp ?
May 8th, 2009 at 7:18 am
You can return the missed CD/DVD-ROM drives (Code 39 error.) by editing the Windows XP registry. Obviously, it is too risky to edit the Windows XP registry if you are not familiar with it. To fix the error from the registry, carry out the following steps:
Exit and close all applications currently running on your PC.
Click Start > Run and type in Regedit, press Enter.
Look for the following registry key:
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlClass {4D36E965-E325-11CE-BFC1-08002BE10318}
Delete any of the following registry entries under this key directory:
LowerFilters
LowerFilters.bak
UpperFilters
UpperFilters.bak
Reboot your PC and open My Computer to check that the CD-ROM drive is visible.
Also, have a look at the Device Manager to see if the yellow exclamation mark and the error code 39 are gone.
You can refer :How To: Fix Disappearing DVD/CD-ROM Drives In Windows Vista Or In XP(Error Code 39)