Windows fatal exception: access violation why？

A Windows fatal exception: access violation error occurs when a program attempts to access a memory location that it is not allowed to access. This can happen due to a variety of reasons, including:

1. Software bugs: A poorly written software or a bug in the code can cause the program to try to access a memory location that it is not allowed to access.

2. Hardware failure: A hardware failure such as a faulty RAM, hard drive, or motherboard can cause data corruption, resulting in access violation errors.

3. Driver issues: If a device driver is outdated, incompatible, or corrupted, it can cause access violation errors.

4. Malware: Malware or virus infections can corrupt system files, causing access violation errors.

5. Operating system issues: A corrupted or damaged operating system can cause access violation errors.

In order to fix the error, you can try updating the software or device drivers, running a malware scan, performing a system restore, or reinstalling the operating system.