My .02 worth: The load on your CPU math co-processor and system RAM is brutal. This is compounded when you have maxed out your RAM and are into Virtual Memory.(use CTL-ALT-DEL to pull up your task manager and look at the bottom for memory used. Even simple models get me above 1GB RAM with SW05). This may be too geeky for this forum, but my most stable setups have been with recent performance oriented components like: motherboard ($125), 1 GB RAM ($275), Harddrive ($75), Power Supply ($100) and graphics card (Quaddro 980XGL $200 ebay). Something else to consider is that heat is the enemy of your computer. CAD work ramps your CPU up to 100% and keeps it there for long periods. Proper CPU and case cooling are very important. Take the cover off and blow out all the dust with a compressed air can. Once your CPU and RAM get hot enough, they will crash your system if you just yell at them. (not really) Wireframes and geometry are very hard on non-CAD gaming video cards, which are optimized for displaying large, redundant textures. Stability can be improved further by installing SW on a separate drive or bootable partition free of any virus protection, games, or other needless software. Check with your IT dept. if you have internet access with SW to be sure you are safely behind a firewall. If you stick to legit work related CAD websites, you should be fine.
If you have tried “everything else” and still get frequent crashes, try cleaning out the dust first (pay extra attention to the cooling fins on your processor), maybe leave the side cover off for a day and see if that helps. Next I would isolate SW on a separate bootable partition or drive as discussed. Next I would make sure I had a Solidworks certified Graphics card with approved drivers. Next I would spend $400 on 3 sticks of 512MB of performance memory from Buffalo, Crucial, Mushkin, or Kingston. (Tell I.T. you want DDR400 @ 2-2-2-10-1T memory). After this point I can’t think of anything else that would affect stability short of bad drafting habits.
Anyone can be Captain in a calm sea.