hl2 steam error [screenshot]

[demontjuh]

when i load hl2 i can play it for like 5 mins then i get this error

i uninstalled and reinstalled 2 times but it doesn't help what else can i do

please help

 

[kiwii]

try playing it in offline mode?

 

[demontjuh]

try playing it in offline mode?

well it was offline but its fixed now (but i dont no how tho)