Which old version of Windows are you using?
Microsoft Security Essentials is supposed to uninstall spyware and viruses, not install them. Having said that, MSE is one of the weaker anti-virus packages. I suggest you disable MSE and install the free version of Avast from
It is far more effective than MSE at protecting Windows.
I hope this helps.
If there are no security updates there will be no updates. Personally I would chuck Security Essentials and download the free version of Avast for better protection and cloud based security updates.
Because you should enable firewall
no answer?why are you causing trouble?