How to avoid these kind of attacks? I normally don't backup my files.
Sandboxie
VMWare Workstation
I have pirate copies of both.
Or you could use VirtualBox for free fully legal.
Another way would be to switch to linux.
Yeah, linux is a pain in the ass to use.
And VMWare Workstation is a much better app then Virtualbox. It's easier to use and it's much more polished. You can also download VMWare Workstation from VMWare, all you need is a valid serial # (I have a keygen, I can give you one if you need it).
As far as hypervisor quality/security, I don't know if either is better or worse then the other.
Also, Virtualbox only offers a hosted hypervisor, if you want a bare metal hypervisor you're going to have to go w/ a VMWare product.
VMWare is free to use. It's easy once you get use to it. A little tricky for the noobs but after a little learning it's a breeze. Please do not use a keygen. Most keygens contain a bot or virus.