Ipod 13 download Windows virus

Recently I saw a link which says: IPOD 13 DOWNLOAD WINDOWS. I clicked on the link and an exe file downloaded. I thought that its a software update for IPOD which can be installed from windows.
To cut a long story short I installed the software and then restart the PC, after reboot the system become so slow that it took ages minute to open my computer and also I couldn't find the installed software.
It’s some kind of virus which I intentionally installed on my system, what kind of an idiot I am
Please Help ME!
You people are my last hope.
