Hi there, recently my notebook started lagging (like a lot, it is barely usable) some time ago. These lags or slow performance occures from time to time and can last up to few minutes (like 5 was probably max). It was brand new machine, the only thing - it was bought from "second hand". I enabled hyper-v visualization or something like this, since i needed it for my study. Almost all files and executables programmes are all official (except like 1-2). I installed two antivirus softwares but none of them were able to find any malware. Any (i mean absolutely any) help would be really appreciated! Thanks in advance.