Ok, Thanks for the advice.
I bought a can of compressed air today and tried to open the laptop but I was unable to do so because 2 screws were stuck.
I used the compressed air to clean the dust and so far it emits less heat than before.
I will do the other tests over night and feed you back.
I ran Windows defender offline quick scan now and there were no issues, or at least I think so as I was not prompted that there's any threat.
Do you recommend running a full scan ?
I think it'll take me another night for that.
I ran memtest86 and after 90 minutes the laptop shut down.
I went to check and found extensive heat from underneath.
I don't have a cooling pad so I put two small blocks under the laptop to give some space for cooling and restarted memtest86, hopefully it will finish without problems :-(
You may have other issues, memtest creates very, very, little heat. See if your vent are clogged with dust, blow it out if so.
12:30 hours, 50% of the 6th pass and no errors so far.
Yes, it finished 8 passes without errors.
After a couple of hours I'll start the Windows Defender Offline full scan and feed you back.
I have a question here, just in case I ended up without solving the problem.
My laptop didn't came with a separate windows CD, it came with a utility to take a backup of the existing system at that time, and I took my first back up a couple of months later.
I don't want to restore from the backup, I want to install a fresh copy, so if I can get a copy of windows 7 without a key and use the key that came with my laptop, will that be OK ? i mean will that copy identify my key, supposing that both copies are Home Premium.
Quote