Run a virus scan
I think i fixed it without running a virus scan. I didn't notice this before, but apparently my PC didn't recognize my DVD drive (it just wasn't there in MyComputer, or Device Manager). So what i did was just open the case up and kinda nudged the SATA cable a bit, to make sure its connected. And when i turned on my PC, DVD drive was listed (working), and my HDD light indicator is back to normal (off when i'm not opening anything or installing). Really strange... i don't even know how can those 2 issues be connected like that i mean i didn't even touch my HDD SATA or power cable
Anyway so far so good... ill see if things will change again. I just wanted to say thank you for your reply and time that you took to try to help me.