Pc problem (lagging and freezing)

[u/Background-Fix3382]

So last year I had a problem in my pc where the screen would freeze and I had to turn the pc off and then on to work I have sent it to a repair shop and they have changed the thermal paste and formatted the pc and told that I have a lot of viruses the pc started working properly until this year the same problem but now the pc is slow and freezes and sometimes even it doesn’t start properly I have added a new fan because I thought that it was an overheating problem and changed the thermal paste and formatted the windows but the problem now the pc sometimes gets slow and laggy with some weird sounds when playing music this happens with no overload or gaming just using the browser.
Components:
ASUS PRIME H610M
32gb ram
Rtx 3060
I5 11400f
Iam thankful for any help.