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If the computer thinks your C: drive is invalid, you need to reload the operating system. In those conditions the disk has become corrupted or the OS has been trashed by a virus. If you have a disk in either the floppy drive or the CD drive and the computer is trying to bootload from there, just remove the disk and it should boot ok.
What else can I help you with?
What is the system disk?
The system disk is the partition from which the operating system was loaded at startup.
What should you do if need to make a startup disk from a Windows 95 or 98 system?
In the Add/Remove Programs icon is a tab called Startup Disk, click the tab
What causes A Disk Read Error Occurred?
the logical choices is:: MAY BE YOUR DISK IS DAMAGED; SYSTEM MALFUNCTION; AND INVALID HARD DRIVE
What is A folder with a stop sign in mac computers?
A folder with a stop sign icon on Mac computers indicates that the system is unable to locate the startup disk or that the disk is not functioning correctly. This may occur due to hardware issues, problems with the operating system, or if the startup disk is not properly set. To resolve this, users can restart the computer and hold down the Option key to select a different startup disk or troubleshoot the disk's health. If the issue persists, further diagnosis or repairs may be necessary.
What is an MS-DOS startup disk?
An MS-DOS startup disk is a floppy disk that contains the MS-DOS operating system files necessary to boot a computer. It allows users to start their systems in a DOS environment, enabling them to run commands, access files, and troubleshoot issues when the primary operating system fails to load. The disk typically includes essential utilities and tools for system maintenance and recovery.
How do you Erase mac startup disk?
Go to "System Preferences", then select "Sartup Disk" in "System" section. You gonna see the list of all available partitions for booting. Select the partition you want.
Why does my mac book pro start up with a question mark at the centre of the grey screen?
A question mark on the grey screen of your MacBook Pro indicates that the system cannot find a valid startup disk. This may occur due to various reasons, such as a corrupted operating system, a failed hard drive, or incorrectly configured startup disk settings. To resolve this, you can try resetting the NVRAM/PRAM, booting into Recovery Mode to repair the disk, or checking your startup disk settings in System Preferences. If the issue persists, it may require professional assistance or a hardware check.
How do you download a boot startup disk?
bootdisk.com........you can get it from here
What is the difference between a Windows 98 startup disk and a boot disk created with the format A s command?
Windows 98 startup disk has some useful utilities and can be used to repair Windows 98 without any additional drives. A floppy which was created by format A s, just have loader, and couple system files to be able to boot MSDOS.
What command used on a startup disk can you use to demonstrate the master boot record is healthy but which does not validate the file system on the drive?
Fdisk/status
What does invalid BSD file type mean when repairing a Mac disc?
The "invalid BSD file type" error when repairing a Mac disk typically indicates a corruption in the file system or an issue with the disk's partition structure. BSD (Berkeley Software Distribution) refers to the underlying file system used by macOS. This error can prevent the disk utility from properly accessing or repairing the disk, potentially requiring more advanced troubleshooting or data recovery methods if the disk is severely damaged. In some cases, reformatting the disk may be necessary, but this will erase all data.
How do you boot into Mac OS X without changing the startup disk?
press on startup to display the bootable disks.
