I bought a laptop with Ubuntu on it but i wanted Windows 10. I installed Windows with USB deleting every partition in the custom installation part and installed Windows 10. But now i found out that the removal of Linux isn't that simple and that I may have left some Linux partitions but can't see them and that the Windows can't work on ext4 but only on NTFS. I've ckecked the partitions but I can't see any that are not affiliated with Windows (I have 3 of them) and the Disk Management says the format type of the HDD is NTFS. Am I missing something? I need an anwser quick! Thanks!