Half life 2 vista 64bit error

Never heard of A-Data tbh.
What info does CPU-Z give on the DIMMS?

Try to boot with one stick at a time to check for bad modules.
Also, ctrl+alt+del and check out what background processes are running. If this is a pre-built PC then you may have a lot of bloatware - unnecessary software taking up valuable Memory.
As a final though, check your page file settings and make sure it is active.

Ok mate. Do me a favour, and respond to each suggestion please. I understand theres a language barrier, cant help that im afraid.

- CPU-z report

- Check Page File

- Boot with one DIMM at a time

- Check background processes

Lol same. Well post up when you get a chance.

Try this:

Go to your Steam- My Games, right click Half-Life 2, go down to properties.
Click on 'Set Launch Options'.
Put "-32bit" in the box (without the speech marks), hit okay/apply and then run the game.

Hopefuly that should fix the issue, I had some trouble getting the game to run natively in 64bit mode, unfortunately this seems to be down to a recent patch that valve released.. seemed to break it for me anyway.