### Sage won't work on Windows

I've just installed sage on windows. I downloaded the sage 5.1 disk and installed it under VirtualBox. Now when I attempted the tutorial trying to solve

```
x = var('x')
solve(x^2+3*x+2, x)
```

I got the following error: `You must install the optional Kash package to use Kash from Sage`

.

SInce I don't have access to the command line I couldn't attempt the solution described here.

In case this question has been asked before, i couldn't find it after ~~searching.~~searching.

What did I do wrong? How can I solve this? Thanks.