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What is Error Code 999 & How to Quickly Fix it
Low memory or incorrect registry entries can cause this error
4 min. read
Updated onOctober 4, 2023
updated onOctober 4, 2023
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While using your PC, you can run into an annoying Windows error 999 notification which is often triggered while trying to open an application.
In this article, we’ve outlined the most common causes of the error code 999 and some of the best-known fixes to help you resolve it.
What causes the error code 999?
The error code 999 is usually caused by the following:
How can I fix the error code 999?
1. Close the background programs in Task Manager
The actions of some third-party apps can conflict with Windows operations. Disabling such processes in the task manager can help fix the error code 999.
Here is a detailed guide on how to fixTask Manager not responding.
2. Perform a full PC scan
Viruses and malware are the most common causes of Windows errors; you can resolve the error code 999 by running a virus scan. If you’d like, here are thebest third-party antivirus tools for Windows.
The safest option to scan your PC for viruses and also remove them is by usingESET NOD32because it has the latest antivirus protection and high detection capabilities that will surely keep away all threats.
3. Run a Disk Cleanup
Disk Cleanup can remove corrupt App data from your PC; however, you also lose files that aren’t backed up. Ensure youbackup your PCbefore running a disk cleanup.
4. Reinstall the graphics driver
After a reboot, Windows should automatically install the drivers. However, if you’d like to install it manually, here is a detailed guide showing you how tomanually install drivers on Windows.
5. Run the SFC/ DISM scans
An SFC scan scans and repairs corrupt system files, causing errors in the system. If you’re experiencing code 999, an SFC scan can help fix it.
If you experience aWindows Resource Protection errorduring an SFC scan, read our guide to fix it.
Fixing the error code 999 is straightforward when you have the proper steps to follow. By the end of this article, you should be able to fix it.
If you have any questions or suggestions on how to fix the error, let us know in the comments.
Loredana Harsana
Windows Software Expert
Loredana is a passionate writer with a keen interest in PC software and technology. She started off writing about mobile phones back when Samsung Galaxy S II was on top of the world and she fell in love with tech of all sorts.
Whenever she’s not at her work desk, you’ll find her enjoying refreshing tea flavors, spilling stories on paper, and listening to the radio.
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Loredana Harsana
Windows Software Expert
Loredana is a tech enthusiast who tackles mobility, privacy, and networking in easy-to follow guides for everyone.
