"Application acs.exe has been blocked from accessing Graphics hardware."

terminator123 · Oct 13, 2014

GTX 660,
Intel core i7 4970k
200mhz ram 16gb
windows 8,1

hi i keep getting all these errors when i play games.my game crashes and becomes all slow and sometimes i have to restart my pc (from the output button on my case) sometimes i can head ctrl alt del and close game but sometimes i cant. ive tried everthing! removing drivers, installing new drives. im using gtx 660 and before i used intel hd graphics and never had this trouble befoe
below are event viewer logs
Errors:

"The driver \Driver\nvoclk64 failed to load for the device ROOT\SYSTEM\0002."

"Application explorer.exe has been blocked from accessing Graphics hardware."

"Application acs.exe has been blocked from accessing Graphics hardware."

"Display driver nvlddmkm stopped responding and has successfully recovered."
ive tried taking off all security access, windows defender, firewall etc. it still happens!

im wondering if someone can help please.

i7Baby · Oct 13, 2014

Run a virus scan eg Avast, Malwarebytes

terminator123 · Oct 13, 2014

i7Baby :

Well I'll try but I highly doubt its a virus, this is a brand new pc and ive only installed steam, assetto corsa arma 3 and garry's mod. and this issue has only happened since i installed my gtx 660.

i7Baby · Oct 13, 2014

Well why ask for help?

What AV do you have?

terminator123 · Oct 13, 2014

i7Baby :

because i need help and other forums havent found fixes for this
and i said i dont think it will help for a reason which was because on them forums they never mentioned about av
and i just installed malwarebytes and im using it now
i havent installed any other av YET

and ive finished the scan, nothing was found.

huilun02 · Oct 13, 2014

It could be a driver issue.

Are you logged in to your PC as administrator?

Do complete uninstall of existing Nvidia drivers with this
http://www.guru3d.com/files-details/display-driver-uninstaller-download.html

And then install the latest drivers from Nvidia
http://www.geforce.com/drivers

terminator123 · Oct 13, 2014

huilun02 :

Hmm okay I'll try this then thanks
and this is what I am getting also: http://puu.sh/calHD/cdd4ff350d.png
and I believe I am yes

terminator123 · Oct 13, 2014

Deleted, reinstalled and i still get this
The driver \Driver\nvoclk64 failed to load for the device ROOT\SYSTEM\0002.

and my game crashes and pc freezes

?

i7Baby · Oct 13, 2014

What AV have you installed?

Quite often driver problems are caused by viruses.

terminator123 · Oct 13, 2014

i7Baby :

Malwarebytes, scanned. no results.

i7Baby · Oct 13, 2014

You also need an active AV eg Avasy free from CNET. Malware bytes only does a scan and database update on request.

Paul NZ · Oct 13, 2014

Dont use Cnet, if youre not careful and click on the wrong download link it'll give you malware infected installers. If you get Avast get it from the Avast site, not Cnet

Looks like nvoclk64 belongs to some Nvidia utility driver. Maybe Rivatuner uninstall it

i7Baby · Oct 13, 2014

Replace it with a valid version -

Step One: Insert a Windows install CD into the hard disk.

Step Two: Click Start, click Run, or press the WINDOWS KEY + R button. Free Scan Pc Now!

Step Three: Expand cd Drive through typing the command one by one: \i386\nvoclk64.sys c:\windows\system32\nvoclk64.sys.

Step Four: Press Enter to confirm the modification.

Step Five: Restart the computer.

Paul NZ · Oct 13, 2014

Its not a windows file

i7Baby · Oct 13, 2014

It is.

Paul NZ · Oct 13, 2014

Why isnt it on this then?

i7Baby · Oct 13, 2014

On what?

Paul NZ · Oct 13, 2014

It belongs to Ntune, so its NOT a windows file.

huilun02 · Oct 13, 2014

Or just run system file checker?

"Application acs.exe has been blocked from accessing Graphics hardware."

Honorable

Titan

Honorable

Titan

Honorable

Splendid

Honorable

Honorable

Titan

Honorable

Titan

Polypheme

Titan

Polypheme

Titan

Polypheme

Titan

Polypheme

Splendid

Share this page