Hi, I'm having troubles with my computer. Last days, it began restarting infinitely after booting on for 3 sec. I tried booting it with the HDD unplugged and nothing changed, so I assumed it wasnt the problem. I also bought a new PSU because the last one was cheap and I also replaced the motherboard's battery. Now, the computer always boots on, but freezes everytime I try to use it. I'm at lost, I don't know which part to change. Also, my monitor displays nothing when I plug my DVI directly to my MOBO and before windows boots, I am unable to access BIOS when clicking on F11, as it is written on screen. I built this computer a year ago and it has always worked fine, even played the latest Assassin's Creed at high settings and Kingdom Come Deliverance High/Medium When in task manager : Shortly after the PC has managed to stayed on for more than 5 min (which is rare), my HDD is at 100%, but after 10min or so, it goes down to an average percentage. RAM and PCU have average/normal % of utilization. And I checked the T° of all my components : everything is in order. I also performed a full analysis for viruses (1h and a half) and found nothing) Here are my specs: PSU - Seasonic FOCUS, SSR-550FM 550W 80 + Gold Power Supply, Semi-Modular, ATX12V/EPS12V PCU - Intel i5-7400 3ghz quad-core MOBO- MSI B250m Gaming Pro GPU - NVIDIA GTX 1050 Ti HDD - Seagate Barracuda 1Tb RAM - Patriot 8gb 2133 (Cheap but worked fine for a whole year) + I ordered a Team Elite + 8gb 2133 to upgrade to 16gb of RAM I added the said 8gb of RAM last night and the computer worked fine all night, I even managed to play some games, but had little latency issues, annyways, I was just glad it finally worked..... BUT I woke up this morning thinking about how I was happy my computer would finally work and it froze again and again, after 3 freezes in windows startup, I gave up.... When it freezes, the computer looks like it is still doing fine, nothing changes in sounds, LEDs, etc... Only the screen doesnt move, neither does the mouse/keyboard/sound. After I upgraded my PSU and my RAM, I'm thinking the issue could come from the MOBO... I CAN'T FIND THE DAMN PROBLEM. I need your help everyone !