I formatted my SSD and done a clean install of Windows 7 home premium. Everything was absolutely fine. Restarting my PC it booted up as quick as it should each time. Then, I restarted it and noticed it was booting quite slow. I checked the boot sequence in the BIOS and it was set to boot from windows boot manager (P0 Samsung EVO 250GB SSD). I changed it back to boot from P0 Samsung EVO 250GB SSD, but it wouldn't boot. Said something like select a bootable drive and restart. So I had to change it back to windows boot manager so I could boot it. I installed Windows again and everything was fine. After restarting it for like the 10th time after install, it happened again! Someone please help.