How to fix a fatal exception error
Microsoft Windows and software use exceptions to allow Windows or other software to communicate in layers and communicate errors or exceptions. If a program is given an exception that is invalid or unknown, you'll encounter a fatal exception. Fatal exceptions are also commonly referred to as a Fatal 0E, or improperly as a Fatal OE.
When a fatal exception is encountered, the error is in the following format.
A fatal exception <YZ> has occurred at xxxx:xxxxxxxx
In the above example, the YZ represents the actual processor exception; this can range from 00 to 0F. Each of these processor exceptions is explained under extended information.
After the processor exception is the enhanced instruction pointer to the code segment and the 32-bit address where the error exception has occurred.
Search for the error
Often the easiest and fastest method to locate what's causing a fatal exception is to search for the error. However, it may be difficult for some users to know exactly what to search for because of the cryptic fatal exception messages. Below are tips on how to search for these errors.
- As mentioned above, the fatal exception has a two-character code. For example, if the "0E" is present, use this as part of your search.
- Next, the error message should contain a pointer (e.g., "0028:c001e36"). Although it may be in a search, it's usually unique to your computer. If you're not finding any search results, exclude this from your search.
- Finally, many fatal exception error messages contain a file that generated the error, which is often a VXD file. If the fatal exception error contains a reference to a .VXD file, include this as part of your search. The VXD file may also be listed as "VXD VWIN32," which is vwin32.vxd.
If searching for the fatal exception error does not return results or help resolve your issue, continue to the following sections.
Revert Windows back to an earlier copy
If this has recently started occurring, and you're running Windows XP or later, restore Windows to an earlier copy.
Update software or check for software patches
If you are experiencing invalid page faults in only one program, verify that the software program is compatible with the computer's operating system. Also, check with the manufacturer or vendor of the software program to see if there are any available patches or updates.
It is also important to have all the latest Windows updates.
If fatal exceptions happen when using a hardware device (e.g., when you print), the devices drivers are either conflicting with another device, corrupt, or have other errors.
Video drivers are also notorious for causing fatal exception error messages. Because the video card is always used, it's difficult to know if it's causing the error. Therefore we always recommend having the latest video drivers on your computer.
Visit the manufacturer's website and get the latest software and drivers. See the computer drivers page for a listing of hardware companies.
Recently installed software or hardware
If you have recently installed new software or hardware, uninstall or reinstall that software or hardware to verify it is not causing your issue. With a hardware device, visit the manufacturer's website and get the latest software or drivers from them. See the computer drivers page for a listing of hardware companies.
Remove all TSRs
Disable any TSRs or programs running in the background since fatal exception errors can be caused by conflicts between two or more open and running programs.
Delete all program temporary files
If you have overclocked any component in the computer, set the computer to its factory settings to verify that the overclocked component is not causing the issue.
Verify your computer has more than 200 MB available
If your computer is running low on hard drive space, your Windows swap file cannot increase in size when needed, which causes errors.
Run ScanDisk and Defrag
Verify that all fans in your computer are properly working. If all fans are working, you may not have enough fans, and your computer is overheating. An overheating computer can cause multiple issues, including fatal exceptions.
Disable External Cache in CMOS
If the option is available, enter your computer's CMOS setup and disable the external cache. If this resolves your issue, you are likely encountering a heat-related issue.
CPU Core Voltage
If available, verify in your CMOS setup that the CPU core voltage is set to the factory specification. Consult your motherboard documentation, which is on the website of your motherboard manufacturer.
Bad memory, invalid bits or physically bad memory
Bad computer memory is also a common cause of fatal exception errors. If you have recently added memory to the computer, we recommend it first be removed to verify you're not experiencing conflicts.
If no memory was recently added to the computer and you tried all the above recommendations, test your computer memory for errors.
Below is a listing of the more commonly experienced processor exceptions ranging from 00 to 0F.
00 = Divide Fault
Division by zero is attempted or if the result of the operation does not fit in the destination operand.
02 = NMI interrupt
Interrupt 2 is reserved for the hardware non-maskable interrupt condition. No exceptions trap through interrupt 2.
04 = Overflow trap
INTRO instruction has executed, and the OF bit is set to 1.
05 = Bounds Check fault
The array index is out of range.
06 = Invalid Opcode fault
Caused by one of the below conditions.
- Processor attempting to decode a bit pattern that does not correspond to any legal computer instruction.
- Processor attempting to execute an instruction containing invalid operands.
- Processor attempting to execute a protected-mode instruction while running in virtual 8086 mode.
- Processor attempting to execute a LOCK prefix with an instruction that cannot be locked.
07 = Coprocessor not available fault
08 = Double Fault
This error occurs when processing an exception triggers a second exception.
09(OD) = Coprocessor Segment Overrun
10(0Ah/0A) = Invalid Task State Segment Fault
Multiple possible causes, as Task State Segment contains multiple descriptors.
11(0Bh) = Not Present Fault
The not present interrupt allows the operating system to implement virtual memory through the segmentation mechanism. 0B fault occurs when this segment is not available.
12(0Ch) = Stack Fault
Instruction refers to memory beyond the limit of the stack segment.
13(Odh) = General Protection Fault
Condition is not covered by any of the other processor exceptions. The exception indicates that this program was corrupted in memory, resulting in the immediate program termination.
14(Oeh) = Page Fault
Paging protection rule is violated. In other words, when the retrieve fails, data retrieved is invalid, or the code that issued the fault broke the protection rule for the processor.
16(10h) = Coprocessor error fault
Unmasked floating-point exception has signaled a previous instruction.
17(11h) = Alignment Check Fault
Only used on 80486 computers. Caused when code executing at ring privilege 3 attempts to access a word operand that's not divisible by four, or a long real or temp real whose address is not divisible by eight.