Error 81 (simple solution found)

[Thejunior]

So. I'm getting Error 81 when trying to start Grey Goo - Sometimes It'll start. other times. error 81. I'm not using Comodo, or other such programs. Is there a fix for this?

Again: Sometimes it works. othertimes Error 81. I've got it to work most of the times when i restart my pc and then open Grey Goo before anything else

My Specs

GPU: GeForce GTX 770
CPU: Intel(R) Core(TM) i5-4670K @ 3.40GHz
Memory: 16.00GB Ram
Operating System: Windows 7 Home Premium

[Thejunior]

I have found a solution and I want to share it with you;

Error 81 is a miscommuntication with GooG.exe and your firewall.
How to fix: You'll have to put your firewall, F-secure/comodo/etc offline. Then Verify the integry of game cache, launch the game once, put firewall back on. And from now on it should work. ( Works for me )

How to verify?
Go to Steam Library --> Gray Goo --> Right click and go to Properties --> Local files --> Verify Integry of game Cache.

Hopefully this helps you! Good luck!

[Mephiston87]

yeh its your anti virus deleting your exe on launch. get norton lol.