Run android on windows 7 All I want to do running Android on Windows 7 is using whatsapp for certain group discussion.

I tried BlueStacks, but it causing keyboard issue, at many times, certain key act like got stuck, keep repeating, and when this happen, I have to restart my windows.
quit the bluestack won't help.

now I want to try other (free) option, any recommendation?
youwave is not free.
I come across this androvm, but the file type is ova , no idea how to run it at present.

just to re-clarify:

I already running WhatsApp over BlueStack on my Windows 7 64 bits.

But it comes with a side effect, very bad. At time, my keyboard seems like got 1 key stuck, and keep repeatively pressing it unstopped.

the keyboard is absolute fine. I kill/quit BlueStack if I don't plan to use the WhatsApp, which is auto-start whenever i login.

when the funny keyboard issue happened, the only way to resolve it is reboot, quit the BlueStack won't help at all.
You could simply unplug the keyboard and plug it back in. Works for me every time.