Fixing Windows System Error Code 997 Overlapped I/O operation is in progress
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What happens

This error message appears when there is a serious problem with your Windows Operating System. It is an indication that your system is unstable and is likely to run slow, freeze, give false error messages and even lead to a system crash or hardware failure. When this error message appears you must act immediately to prevent serious damage to your software, saved data and hardware. It often occurs when a program is removed and then registered again.

3 things you should do if Overlapped I/O operation is in progress

This is a serious issue and not something that the average user should try to correct by experimenting as it could lead to even more serious consequences. The best option is to go to and download the tool that has been created to repair registry problems, including the 997 error. When you go to this site you will be asked if you want to download the application. Click on Yes and after the download has been completed, click on Run and follow the instructions that are displayed. Once the tool has been installed run it and once that is completed, reboot the system. In most cases the problem will be fixed but if it does persist, contact Microsoft’s online support.

TipFor more information, please see: How to fix System error #997

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