Fix: Application has been blocked from accessing graphics hardware
An app suddenly stops working while you are using it, crashes without warning, and then shows the message “Application has been blocked from accessing graphics hardware.” This error means that Windows has stopped the app from using your graphics card because there was a problem or delay with the graphics driver.
The most common reason for this is a damaged or unstable graphics driver, which can sometimes happen after your computer wakes up from sleep. Other possible causes include damaged system files, overheating, or problems with other drivers.
1. Update Your Video Card Drivers
Updating your video card drivers is often the first thing to try when fixing graphics problems, and many Windows users have found this step helpful when facing this particular error.
1.1. NVIDIA Graphics Cards
If your PC uses an NVIDIA graphics card, visit the Driver Downloads page. Enter your product details or use their automatic scanner to check for new driver updates.
1.2. AMD Radeon Cards:
AMD users should go to the AMD website to find updated drivers for their graphics cards. You can use their automatic tool or search for the exact model manually.
1.3. Intel Graphics:
If your computer has Intel graphics, use the Intel Driver Update Utility to find and install the latest drivers.
2. Replace Your RAM
In some cases, faulty RAM (memory) can cause this error message. A few users have solved this problem simply by replacing their bad RAM. However, replacing RAM isn’t always the fix—so before you buy new memory, ask a technician to check your current RAM to see if it really is the cause. Here are some tips to keep in mind:
2.1. Match the RAM Type:
Make sure to get the same type of RAM that your PC or laptop currently uses. For example, if your computer has DDR3 RAM, you should only replace it with another DDR3 stick.
2.2. Power Off Everything:
Always unplug your computer—and if it’s a laptop, remove the battery—before touching any internal components.
2.3. Check RAM Slots:
Computers only have a limited number of RAM slots, so consider getting higher-capacity RAM sticks if needed.
3. Reseat Your Graphics Card
Some users have found that simply removing and carefully putting their graphics card back in its slot fixes the problem. Sometimes, the graphics card may shift slightly out of place. To check this, lay your PC on its side, open the case, and make sure the graphics card is firmly and properly seated in its slot.
4. Clean the Fan Inside Your PC/Laptop
Your computer’s fan is essential for keeping everything cool, and a dirty fan can cause hardware to overheat and underperform—sometimes leading to graphics errors. To ensure your system stays cool:
- Use a small vacuum cleaner to remove as much dust as possible as soon as you open your PC or laptop.
- Use cotton swabs or similar tools to reach areas your vacuum can’t get to, especially near the fan blades.
5. Downclock Your Graphics Card
You might have heard of overclocking, which means running your graphics card or processor faster than its standard speed for better performance. While this can make your computer run faster, it can sometimes cause problems if things get too hot or unstable.
On the other hand, downclocking (or underclocking) means making your graphics card run at a slower, safer speed to prevent overheating and save energy. Some users have reported that downclocking has stopped the “Application blocked” error from appearing.
6. Reinstall Your Drivers from Scratch
If none of the above solutions work, you might need to completely uninstall your video card drivers and reinstall them. This can fix issues caused by bad driver installations or conflicting driver versions. Here’s how:
- Use a tool like Display Driver Uninstaller to completely remove your current graphics drivers—it will ensure nothing is left behind.
- Download the right drivers manually from the official Nvidia, AMD, or Intel website instead of using tools like GeForce Experience. If the latest drivers don’t work, try installing an older version.
