It was all okay till today. I installed about 150 Windows Updates. When I played one facebook video at full-screen, my screen turned black and the led was blinking.
When I restarted the PC, some weird signs started appearing on my screen (at dos). A lot of them, something like "fsda8f724ja" etc. Then it continued to second screen,
where I saw a lot of signs - triangles (still in DOS). When it turned to Windows logo and loading, some weird blue strings appeared on it. I thought = graphics card is dead.
There should be login page after Windows loading, but my screen started to blink again. Bad news. Then:
- I plugged out the HDD and tried to load bios again - still weird signs appeared on the screen
- I plugged out the graphics card, cleaned it and put back - still bugs all over the bios/dos
So I decided to check if Ubuntu will load. Ubuntu logo showed and it was loading, but the background was violet.
Then it loaded up. Normal wallpaper, normal graphics, and it was asking about what do I want to do - open from cd or install.
I choosed open from cd. After 10 seconds it all turned to hm... something which should be a Ubuntu interface, but it was "cutted"
and everything was crashed (I don't know how to describe it). I turned off the PC by I/O button on Power-Supply. Turned it on again.
Now the weirdest part - when I turned the computer on, it loaded normally, without any artifacts, graphics issues, windows issues.
It seems that my graphics card is on low health, and it might break in any time. Weird is that it runs perfectly now (!)
I think that you can mark this thread as solved, since it seems that my hardware is trying to retire (...), and I don't think that you can assist me further with it.
Anyway thank you again a lot for your help and involvement!