Difficulty: Moderately Challenging
Step1
Download the compressed file PTEDIT.zip from the Symnatec website (see Resources below). Save it to your hard drive, to a location such as your desktop where you can easily find it.
Step2
Create a bootable disk. Insert a floppy disk into the disk drive. Double-click on "My Computer" and then right-click "Drive A." Next, click on "Format."
Step3
Check "Create an MS-DOS Startup Disk" and then click "Start." Click on "OK" in the confirmation screen, and then click "OK" again once the formatting process is complete.
Step4
Copy the PTEDIT file to your floppy disk. Do this by double-clicking the downloaded zip file, right-clicking the "ptedit.exe" file, and then clicking "Copy." Next, you'll open "My Computer" and double-click on "Drive A." Click the "Edit" button (it's located toward the top of the window). Click on "Paste."
Step5
Place the floppy disk into the drive of the computer that has the "Autochk" error. Configure your BIOS settings so that your PC will boot from its floppy drive. At the A:> prompt that appears, type "PTEDIT" and hit Enter.
Step6
In the "PowerQuest Partition Table Editor" window that pops up, go to the very first column of the table that is labeled "Type." Normally, the number displayed here will be "07," to represent an installable file system. However, if this number is anything other than this "07," it means that the drive is unbootable.
Step7
Go to the "Type" box using your Tab key. Press Alt+T, which opens up the "Set Type" menu. Now press Alt+S, which will save your changes. Press Ctrl+C to exit. Now Windows should boot normally.