Portal 2 > General Discussions > Topic Details
Joe Apr 18, 2013 @ 7:42pm
Strange Portal 2 startup
When I start up Portal 2 through my steam library, my screen flashes black for a very very short period of time. Portal 2 remains in my processes list for a few seconds then dissapears. I do not wish to contact valve support again because it takes around 2 weeks for a 4 word responce. Anyone able to help me out here?
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Agret ☁ Powered Apr 19, 2013 @ 7:25am 
Go into your Steam\SteamApps\common\portal 2 folder and delete the bin folder, then go into the portal2 folder and delete the bin folder in that too. Right click Portal 2 in your steam and goto properties then validate the game cache, after it finishes re-downloading those files try and play. Report back if it solve/doesnt solve the issue.
Joe Apr 20, 2013 @ 7:08am 
The problem remains the same
Sumnus Apr 20, 2013 @ 4:54pm 
I'm having this issue as well, and have had it for months with no successful fix (including the one above, which i've tried previously). It baffles me primarily because I have successfully played through the game in it's entirety already on the same machine that it no longer works on.
Joe Apr 20, 2013 @ 7:05pm 
I did not have the priveledge. I have played through it on a different machine but with the same account
Agret ☁ Powered Apr 20, 2013 @ 7:49pm 
Download and run this (don't install bing ahhh)
http://www.microsoft.com/en-us/download/details.aspx?id=35
This will ensure your directx is up to date, also download the latest video drivers for your pc (do you know if you have ati, nvidia or intel?)
Sumnus Apr 21, 2013 @ 7:20am 
I was able to find a fix eventually. I had to update the bios to my motherboard specifically, not just everything else. This is far more difficult than it should be, but google is your friend.
Agret ☁ Powered Apr 22, 2013 @ 7:50pm 
Wow that's bizzare, can't see how the BIOS would cause it. Glad you got it nailed down though =)
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Date Posted: Apr 18, 2013 @ 7:42pm
Posts: 7