Hotmail Virus

I'm having a problem with my hotmail account. When I sign in, using my Mac desktop computer, my account appears (as in, I can see my emails etc) but it only stays for one second and then goes straight to a blank page and I can't do anything after that.. It's a real problem because I need to use this computer and email address for work. It doesn't happen on my iPad. I've tried changing my password etc a few times and called Microsoft support twice with no luck.. Does anyone know how I can fix this problem???

Thanks!