Did you do an upgrade from XP to Win-7, or was it a “clean install”? Or were those 3 units new with Win-7? Just wondering...
The 3 were new units. Desktop is a Gateway i5, the Samsung piece of junk laptop is a 17-inch i5, and its replacement Dell is a 17-inch i7.
One morning, the Samsung laptop would just not turn on. I tried all the tricks — removing battery, removing memory, even took out the hard drive and managed to copy files I needed. I read online that others had similar problems. I took it to a local repair shop, since it was out of warranty. We concluded that the motherboard was the culprit, but the repair shop could not find a replacement — not even from Samsung.