Application has been blocked from accessing Graphics hardware.

[MrChaosDesire]

Hello everyone!

I know this question has been asked a lot, and I've seen a lot of these threads on Tom's Hardware itself, but unfortunately, following all of the suggested solutions have not solved this issue for me.

Background::
Recently upgraded Motherboard, RAM and CPU, and had a bunch of issues like BSoD, but that seems to have been resolved (for now).

Problem:
When I'm playing Overwatch, it will sometimes randomly freeze, and the error message "Application Overwatch.exe has been blocked from accessing Graphics hardware." will popup.

Setup:

i7-6700 w/ Stock Cooler
16GB PNY Anarchy DDR4 2400Mhz RAM
Gigabyte GTX 660 Windforce 2X OC
640GB WD Hard Drive (WDC WD6400AAKS-00A7B0)
Asus H110M-A DDR4 Motherboard
COOLER MASTER Silent Pro M500 Power Supply.
Windows 10 Pro

Things I've tried:

1. Updating to the latest nVidia driver.
2. Underclocking the GPU to reference GTX 660 Speeds
3. TdrDelay to 8 (64-bit)
4. Setting an exception in Windows Defender/Firewall for Overwatch AND Battle.net
5. Uninstalling drivers with DDU, including removing C:/NVIDIA, and then installing the latest nVidia drivers (368.81)
6. Staying up to date with Windows Updates

Possible Conflicts:

1. CPU getting to 80~C playing Overwatch, causing GPU Crash somehow(???)

I ran FurMark for 10 minutes and it had no problem at all, so I'm not too sure what else I can really do, other than getting a new GPU at this point.

Please help, as I really want to play and stream some Overwatch again soon.

 

[rgd1101]

Did you reinstall windows after the mobo change?

 

[MrChaosDesire]

Did you reinstall windows after the mobo change?

I used the reset function inside Windows 10, full clean reset, wiping everything from the drive and what not. Didn't work.

 

[MrChaosDesire]

Apparently, one of the RAM was faulty, after running Memtest86 (without the +), it appears there were 4000+ errors on 1 of the stick, and after removing it, it seems to be working fine now. Hopefully I can get an RMA for it soon. Hopefully this helps anyone that might have the same issue.