Are you running on patch 1.5?  If so, you may try turning VSync on in the gfx options, if it is not already.

How you turn it on/off depends on what graphics card you have in your PC.  Do you know what brand of card you have?

This seems to be an issue regarding the new patch.  I am not currently having this issue with my NVidia card  but I have found a fix for your Intel card.


This fix requires installing Explorer Suite  (http://www.ntcore.com/exsuite.php)

Steps:

Before anything, make sure you backup your original SC2 exe file because the next time you patch Starcraft 2 you will need the original exe.

1. Open CFF Explorer and then use it to open your SC2 .exe file.

2. Go to the "File Header" section (under Nt Headers) and click the "Click here" on the Characteristics row.

3. Check the "App can handle >2gb addressest" box, then click OK

4. Go to "Save as", and then rename your existing SC2.exe (for backup)

5. Save the current version as SC2.exe, and voila, the game now won't crash when it's memory space gets too big (you still might want to restart occasionally if you have 4GB of ram or SC2 will push all your other programs out of memory)

This has been done for Firefox, World of Warcraft and Sims 3 before to prevent crashes, so it is known to be safe

Let me know how this works out for you.

thanks for the help, it works now!