Hey guys.I bought Lenovo Ideapad S510p and they gave me a Windows 8 32bit OS and i dont need 32 but i need 64bit OS.So i downloaded one from torrents.It is Windows 8.1 64bit.When i mounted the ISO file and clicked on setup.exe then i got an error msg saying THIS APP CANT RUN ON YOUR PC,To find a version for your PC,check with the software publisher.How can i install now.Please help me