Scandisk: Privileged Operation Error #2 or System Reboots (122671)

SYMPTOMS

When you run Scandisk, one of the following problems occurs:

EMM386.EXE privileged operation error #02 is displayed -or-
Your machine reboots itself

CAUSE

This problem occurs because when Scandisk starts, it makes a single INT1Ah function call to the ROM BIOS. This problem occurs on the following computers:

Canon models C-200 M-50 and C-200 M-55
CompuAdd 386
Computers using a Microsolutions Compaticard
Positive computers
Sharp models 6700, 6781, 6785, 6800, and 6881
Some AEG Olympia 386SX Laptops
Some older ACER machines
Snap-on Intel 386 and Intel Above Board 2.0
Texas Instruments (TI) TravelMate 2000
Zeos 80386 with an AMI BIOS dated 09/15/89

NOTE: The above list may not be complete.

WORKAROUND

To work around this problem:

Use a version of Scandisk from MS-DOS version 6.20 or 6.21. -or-
Obtain an upgrade for the ROM BIOS.

NOTE: A ROM BIOS upgrade may not correct this problem on all machines. Check with the manufacturer to determine whether the updated ROM BIOS can handle this INT1Ah

STATUS

Microsoft has confirmed this to be a problem in MS-DOS 6.22. We are researching the problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

MORE INFORMATION

INT 0x1A was chosen as the detection mechanism by which hardware- implemented MRCI servers can communicate with software. (NOTE: No hardware- implemented MRCI servers presently exist.) Microsoft has found that with some ROM BIOS chip sets, the stack becomes corrupted when this function call is processed. If EMM386.EXE is loaded, it catches the error with its error-handling capabilities and generates the privileged operation error #02. The products discussed here are manufactured by vendors independent of Microsoft; we make no warranty, implied or otherwise, regarding these products' performance or reliability.