Hi! My computer bsods since I got it. A friend of mine built it. I did not tell him my problem, but if it persists I think I'll tell him. If you can help me solve the following problems by myself, I'll be glad, since he's a selfish and he'll, of course, want money because he didn't built my PC correctly. I tried to do a clean install from Windows 8.1 to Windows 7. All fine, after 2 weeks bsods came back. Most common BSODs are IRQL_NOT_LESS_OR_EQUAL and MEMORY_MANAGEMENT which appeared on Windows 8.1 as well. Some more happened less frequently, and they never occured in Windows 8.1. Also there are some different bsods that occured in Windows 8.1 and not in Windows 7. Most of the time, IRQL_NOT_LESS_OR_EQUAL happens just randomly, sometimes 3 times a day (today) and other times none in 5 days. Most of the time, though, MEMORY_MANAGEMENT happens in closing processes. I'm really afraid that my PC will bluescreen if I close Chrome or Counter Strike: Global Offensive. Some examples would be times when I closed Chrome wanting to play CS:GO instead and my pc just blue screened. Other time, I got kicked by my teammates in CS:GO so the game returned to the main menu, which stayed normal half a second, then blue screen. Another game, Block and Load, which is still on development, freezed (it's pretty normal, it's not a final game). I ended the task with Task Manager, then the PC blue screened. What should I do? It's driving me nuts! I think the one that happens in closing processes might be the RAM or HardDisk and the random one happening because of software problems. To mention that random bsods happened way after those which happen in closing processes. Please help me.