I had win 10 32bit but then I want to reinstall a 64bit version. I've checked if my CPU can be 64 or not. Actually I've tried the install before and messed up. I created 3 partitions during install having 2windows of 64 bit and one windows 32bit and selecting that(32 bit) I revert back to all my files and drivers as it is. I want to clean install 64 bit. So please tell me how to delete partitions during install so that I can have only one single copy of windows.