So I just built a new system, installing Vista Business 64bit to tak\nfull advantage of DX10 and large amounts of memory. Not having man\ngames lying around, I decided to download steam and install Half Life 2\n\nIf you are reading this, and using a 64bit edition of windows, then m\nguess is you are having problems with Half Life 2. I encountered tw\nproblems, and after a few hours was able to solve both of them\n\nPROBLEM 1: GAME HANGS ON INITIAL LOAD (BLURRY IMAGE SCREEN\n\n- Symptoms\n\n- "64-bit" message was at top of scree\n- game never loade\n\n\n- Potential cause\n\n- It seems that while steam intended HL2 to have a 64bit edition\nwith an update along the line (maybe with the release of Left4Dea\naccording to others) the support was broken and the game doesn'\nload\n\n\n- Fix\n\n- Unfortunately, the fix removes the 64bit potential. In steam\nright click half life 2, and select <Properties>\n- From the dialogue box, click <Set Launch Options...\n- Enter "-32bit" and select <OK\n\n\n\nThis got HL2 to load, where upon playing I encountered problem numbe\n2\n\nPROBLEM 2: GAMEPLAY CAUSES FULL SYSTEM HAN\n\n- Symptoms\n\n- After playing for less than 5 minutes, the game would crash an\nthe three fingered salute (ctrl+alt+del) couldn't get me out of it\nThe crash caused a full system hang that required a hard-reboo\n\n\n- Potential Causes\n\n- While from Problem 1 we are running in 32bit mode instead o\n64bit, we are still running Vista\n\n\n- Fix\n\n- Go to the HL2 executable, by default [-Program File\n(x86)\Steam\steamapps\<your user name>\half-life 2-\n- right click on hl2.exe and select <Properties\n- select the second tab, "Compatibility\n- check the box for <Run this program in compatibility mode for:\n- select <Windows XP (Service Pack 2)> from the drop down men\n- select <Apply> then <OK\n\n\n\nThis means that we are taking a 64bit Vista compatible game, an\nrunning it as a 32bit XP game\n\nAfter these two fixes, I was able to set my video settings to max (\nthought this was the original problem) and play the game withou\ninterruption. Hopefully steam and/or windows will fix this bug and I ca\nreturn to the intended game settings, but do note that steam says o\ntheir website that 64bit save files are not compatible with 32bit gam\nmode. While mathematically, you should be able to load a 32bit save fil\ninto the 64bit game (as long as it substitutes 0x0 for the upper 32bits\nI have no idea if they will support it. Oh well, another excuse to pla\nthrough one of the greatest games to date (in my opinion!