Hi everybody. This is my first post, generally I suffice with reading the forums and using the info I find to fix my problem. But this time is different. I tried many suggested solutions.
Basically, I bought a laptop 4 weeks ago- Dell Inspiron 15 5000 Series with i5 processor. Within couple of days I started noticing sudden spikes in cpu usage. Considering that the laptop had been with me only for couple of days and no dodgy websites opened, or programs downloaded, I dont believe this could be a virus issue. I even re-installed windows again (btw it is windows 10). but problem continued.
Then I figured out that this spike is driven by 'System' (NT Kernel and System). Furthermore, process explorer shows that it is specifically driven by ntoskrnl.exe!RtlSidHashInitialize+0x1450 (see photo)
I am not an IT guy, but I did my best trying to do what solutions were offered online, including disabling .NET frameworks, updating some of the drivers (network adapter driver for example), run Dism /Online /Cleanup-Image /RestoreHealth etc. but nothing seems to be working.
Few more observations that may help you with solution:
- Spikes in CPU results in lagging cursor/typing, or some weird noise while playing videos.
- I feel like this happens when I open few things at the same time (by this I mean few tabs in chrome and couple of apps, such as word/excel- nothing major). .
- After restarting the issue goes away for a while and then comes back.
- Seems like there is a cyclicality- check the photo please. there is a set interval almost.
Please let me know what can I do?