Well that's strange 'cos according to that link I posted, no 64-bit Windows version is supported.
And as for Windows 8, that's not supported at all, neither 32-bit nor 64-bit.
UK website has exact same info:
http/www.dell.com/support/home/uk/en/ukdhs1/product-support/product/vostro-1014/drivers
Did you check the link? You can see I'm not giving you wrong information, it's there in black & white.
You bought it brand new with 64-bit Windows factory installed?
I suggest you contact Dell to ask why it had an OS pre-installed on it that's not officially supported according to their own drivers page for that model.