Windows 10: Computer hangs/lags when downloading from Steam

This started happening yesterday. Whenever I download a game from steam after a couple of minutes my whole system starts to hang (mouse lags, audio lags, programs lag) and I get high CPU usage in windows explorer, Avast, System Interrupts, and Steam. I've read a couple places that it may be Avast scanning every single file, but I've disabled all functionality down to just the scanner and even disabled the shield and still the hangs happen.
I'm not sure if it is just Steam, since the same thing happened when downloading a driver from Geforce Experience, but when downloading a 1 GB test file from thinkbroadband.com no hanging occurs. I know Win10 just updated on me yesterday so I think that could be a suspect.
My system is plenty powerful and has never had a problem handling downloading (multiple files) and still playing games/streaming video. I could really use some help on this, it's the first time my system has run annoyingly slow since I built it a year and a half ago. Also, I have had programs running at 99% CPU before and never had such a slowdown like this and it isn't even reaching a full 99% now.

I've updated my ethernet driver, graphics driver, ran a ccleaner scan, ran an mbam and avast scan, reinstalled avast (lag happens without an antivirus too), have tried downloading to all of my separate disks and get the same slowdown. None of my hardware is showing as running at full capacity in performance monitor.

:)

 

Severe window lag with windows 10

I make youtube intros a lot... and I downloaded a template for a user and started to suffer extreme window lag when dragging windows. But, I don't thing it is a virus as the window lag comes after a couple days... I don't know if it is in fact a virus or
just because a lot of background programs are running... It especially lags me when I receive a steam message. I have scanned with my antiviruses and found nothing, and have tried cleaning my computer with CCleaner. I don't know what to do. Any idea? It also
takes forever to open dropdown menus.

[Moved from Virus & Malware]

 

Need help fixing high "System" CPU usage when downloading things from Steam and Battlenet

This never used to happen until a couple of months ago. Whenever Steam, or Battlenet are downloading something, my computer starts to lag really bad. I go into task manager, and 75-100% of my CPU is being used, most of which is coming from the app the
is downloading something (Steam, or Battlenet), and 'System'. It took me forever to find a solution for this problem for the Steam problem, but I eventually did find a solution, it requires me to go command prompt, and type "bcdedit /set useplatformclock false",
and then restart my computer. It totally fixes the problem on Steam... But only temporarily. It seems to reset back after a few days (or a few restarts), and then I have to do the process over again. Is there a permanent way to fix this problem? Like make
the "bcdedit /set useplatformclock false" last forever, instead of just resetting after a few restarts? Also, it that solution doesn't seem to work as good for Battlenet as it does Steam. Please help!

 

Well... I'm not sure why this was moved to gaming I'm not having any problems with games. It is most definitely a technical issue it just so happens to be with a gaming service.

 

Well I fixed it, turns out I set a system level variable when following a tweak guide for saints row 2. I ran the command
Code: bcdedit /set useplatformclock true[/quote] to fix a speedup bug in the game. Setting the value back to false solved my hanging issue.

So I guess the issue in the end was somewhat related to gaming (though I still don't think I should have been moved here *Tongue)