i install windows 10 tp (bootcamp) and then i erase it from disk utility. when i do PRAM reset imac starts with a error blue screen of windows 10. how can fix this? (normally imac starts with el capitan but when i do pram reset the windows thing happens. it disturbs me.)
iMac (21.5-inch, Late 2012), OS X Mavericks (10.9)
You should use bootcamp to remove windows. Windows will create a small system partition when it installs and this is sometimes not removed.
bootcamp has an error. and i can't see the windows part on el capitan disk utility.
Im talking about boot camp assistant located in your utilities folder. If you used it to create a partition and install windows you should also use it to remove windows. If you installed windows without using it and removed it you may have to use your recovery partition. Boot into recovery - cmd+r use disk utility and run first aid on your hard drive - also verify you don't have a small system partition left over from windows. You can also set your mac drive as the startup disk.
PRAM reset and windows
