itunes download problem-Lenovo E545 running Windows 7itunes download problem-Lenovo E545-Windows 7

Just bought a new Lenovo E545, It runs Windows 7 (2009). I am trying to download itunes and recieved a mesage

After clicking "ok" the whole download process went "rolling back."

The download then happens all ove again until another message comes up:

When I click "Retry", the same message comes up.

If I click "Ignore" it finishes then this message comes up:

I dont know what I should do next, or what I might be doing wrong. Please point me in the right direction apple community.