1) go to safe mode
--click F9 before the Window 7's icon pop out....if anything..just press ESC, it will exit.
2) go to C:\Windows\System32\drivers
3) delete mcdbus.sys
--
(this is the MagicISO SCSI Host Controller which is causing all these problems!!)
4)Restart and uninstall
--go to start--> all program --> find the MagicDisc --> click it --> uninstall
DONE!! ^^