I have a notebook of Aspire E1-510 where the default OS is Ubuntu 14.04. I was asked for installing windows 7 but when I entered in BIOS and make changes in boot sequence pointing to boot from CD/DVD rom it did nothing. I tried to do a lot of things but could not get the result. Can anybody give me some advice about what to do or where to find information. Bios version is v2.05 and it has only UEFI mode, as I understand it is necessary to switch on CSM from UEFI, but there is not that mode. When I asked about information many users say there is a google and you can find anything you want. I know that and I tried to find helpful source but could not. I need help, thanks in advance.