There's my friend Daksh as all css office player knows.His game crashing.It is the error

[SIZE=11px]Problem Event Name: APPCRASH[/SIZE]
[SIZE=11px] Application Name: hl2.exe[/SIZE]
[SIZE=11px] Application Version: [/SIZE][SIZE=11px]0.0.0.0[/SIZE]
[SIZE=11px] Application Timestamp: 505ba1c3[/SIZE]
[SIZE=11px] Fault Module Name: vstdlib.dll[/SIZE]
[SIZE=11px] Fault Module Version: [/SIZE][SIZE=11px]0.0.0.0[/SIZE]
[SIZE=11px] Fault Module Timestamp: 505ba1c3[/SIZE]
[SIZE=11px] Exception Code: c0000005[/SIZE]
[SIZE=11px] Exception Offset: 0000ff65[/SIZE]
[SIZE=11px] OS Version: 6.1.760[/SIZE][SIZE=11px]0.2.0.0[/SIZE][SIZE=11px].256.1[/SIZE]
[SIZE=11px] Locale ID: 1033[/SIZE]
[SIZE=11px] Additional Information 1: 0a9e[/SIZE]
[SIZE=11px] Additional Information 2: 0a9e372d3b4ad19135b953a78882e789[/SIZE]
[SIZE=11px] Additional Information 3: 0a9e[/SIZE]
[SIZE=11px] Additional Information 4: 0a9e372d3b4ad19135b953a78882e789[/SIZE]

If anyone knows how to solve please help..(His game is NO-STEAM!)