I'm installing MSE on a XP Professional SP3 PC. After the initial install and update, an error pops up:
Microsoft Security Essentials cannot start real-time protection
This operation has been cancelled due to timeout error
Error code: 0x800705b4
I'm translating from the original spanish error message:
Security Essentials no pudo activar la protección en tiempo real
Esta operación ha regresado debido a que el tiempo de espera ha caducado
...
I tried uninstalling / reinstalling with no luck, all the posts I found on the subject suggests problems with active malware or posible interactions with other anti-mailware software: it isn't my case, I did a fresh Windows XP SP3 installation before install MSE.