Cannot play warcraft dota

i have a problem while playing or when am about to play warcraft dota. sometimes when i start to play, the monitor goes black and no signal detected was displayed, or sometimes while i am playing. i have check all the resolution of my display and even set in the game, but to no avail. i haven't check with other games, but it runs well with application other than games.

i have gigabyte GA-EG43M-S2H motherboard with core2duo 2.8ghz, 2gbddr2ram, 320GB HDD, 450watt smps and monitor is Benq 900GW (16:9).

Please help

What are you using for video?

Try updating your video card. Check accelerator for your card. To go here go to your display properties by right clicking on your desktop. Then go to settings ---> Advance. A new box will come out and then you go to troubleshoot.

Note: that you need at least 32 MB video card to play. . .I think. If not, then it could be your screen but I doubt it.

my motherboard is Intel's G43 chipset with integrated GMA X4500 graphic. i've already update the driver and the memory is set to 32 by default.

You have a motherboard with a PCI-E X16 slot.
Get a video card !
Almost anything should beat 32MB of "onboard" video.

If your using integrated video this may be the cause of your problem. Try increasing the allocated video memory to 256mb in your bios and see if this helps.

Sneakycyber i have tried the troubleshoot and set hardware acceleration to different mode but did not solve.

I have tried allocating upto 256MB in the BIOS but not help.

You meet the recommended requirements but just barely with the video card. What resolution are you running on your monitor?

my monitor support 16:9, but i set resolution to 1440x900 or 1280x1028.

But i have tried with different resolution, even match the window resoultion and the game resolution. i can play other games. Could it be due to virus/trojan. recently i have found several virus.

Could be the virus/malware is causing you problems. I would thoroughly scan the computer and go from there. I would run Super Anti Spyware, Malwarebytes Anti Malware, Mcafee stinger, to start with . If you have any other virus software you can run those as well, make sure they are all up to date before scanning.

i have tried several test with symantec, mcafee, avast, spybot S&D, malware bytes, Dr. Webb and several virus were found and cleaned. But the problem still persist. i have even reinstalled the game in case virus effect some files.