It does make the point that this free software will not be good for competitors at this end of the market. I am glad that Microsoft is confronting this issue, since running multiple antivirus applications is terrible for performance. The trickiest moment comes when the installer recommends that you “remove other antivirus and antispyware programs”: Installation was smooth, guided by a simple wizard with a castle logo:
I installed it on my Windows 7 64-bit desktop PC. Businesses are meant to use Forefront Client Security, though “home-based small businesses” are specifically permitted in the license agreement. It runs on XP 32-bit, or Vista or Windows 7 32-bit or 64-bit, the only technical restriction being that Windows must validate as “genuine”. It's a very easy to understand and readable approach compared to the P/Invoke solution, in my opinion.Microsoft has released its free Security Essentials software, antivirus and antispyware protection aimed at home users. All you need to do is use RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry64) and you will overcome the registry redirection. I was writing a P/Invoke solution to this problem, but then I came across this. Using (RegistryKey rk = localMachineX64View.OpenSubKey(location)) RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, Otherwise, if you're using an earlier version of the Framework then you need to use P/Invoke and call the function RegOpenKeyEx with the KEY_WOW64_64KEY flag from the WINAPI as described here.īut onto the solution that I used. NET 4.0 which provides a very clean solution for accessing the 64 bit registry from a 32 bit process. string MseLocation = Files\Microsoft Security Client\msseces.exe" Any assistance in discovering why would be much appreciated.įor the time being I am using the following as a substitute. If (Convert.ToString(productKey.GetValue("DisplayName")) Using (RegistryKey productKey = rk.OpenSubKey(subKey)) String location = (RegistryKey rk = (location))įoreach (string subKey in rk.GetSubKeyNames()) My Method: private static bool DoesMseExist() I'm able to see the keys of other programs in the same directory. The process that is automating the install is run as administrator.MSE is 64-bit on 64-bit machines and 32-bit on 32-bit machines (there are two different installers) Hence, the the path in the registry is always: SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall.Some facts to assist those with answering: This code below is written in C#, but the problem may be applicable to other languages as well. At one point I'm checking to see if the machine (Windows 7) has Microsoft Security Essentials installed - if it doesn't then I install the program. So I have this installer script that I wrote that automatically installs several different products on the target machine.
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