Dual boot laptop approx 600€ (Italy)

Hello everyone! I'm looking for a PC to use at university. I need to do basic programming in c++ (Ubuntu), but I higly prefer Windows for any other task, so I'm thinking of a dual boot. Looking for some low weight gaming as well (League of Legends/tf2 + old games).

• Budget: optimal between €500 and €600, up to 750 if really needed. Buying form Italy.
• I don't require anything particular, don't want super graphic settings or anything. At least 50 fps and 3hrs battery life would be nice though.
• I have Windows 7 installation cd, so no Os is ok to save some money.
• Possibly with numpad, but not fundamental.

I don't know a thing about compatibility of laptops with dual boot, but I guess there are not recommended PCs.