Everytime a portal opens, or I press a button, the following happens: Problem signature:
Problem Event Name: APPCRASH
Application Name: hl2.exe
Application Version: 0.0.0.0
Application Timestamp: 470c11ae
Fault Module Name: StackHash_a2a5
Fault Module Version: 0.0.0.0
Fault Module Timestamp: 00000000
Exception Code: c0000005
Exception Offset: 6c006b00
OS Version: 6.0.6001.2.1.0.768.3
Locale ID: 1033
Additional Information 1: a2a5
Additional Information 2: 5acc6ba9a70f74473502ca3dffbb400c
Additional Information 3: a61d
Additional Information 4: 54adf2c8343b21bccbd709c9ff0928e8


Portal is a cool game of strategy. That's all I'ma say.

I fixed it.

How you fix it????