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I found my windows 10 machine being very slow and using a lot of hard drive.
Task manager, Disk is reporting 100% usage.
I open up Resource monitor, select disk tab. and sort write column. System and taskhostw.exe are using most of disk.
I check taskhostw, and there are a dozen of entries with references to C:\windows.old\... files
I thought this windows folder was supposed to be dormant, but clearly isn't.
Running disk clean up, clean up system files, and select to remove old versions of windows seems to have resolved the problem
Is this an OS problem? or a sign of something else wrong?
Hi, Thank you. I wasn't aware the taskhostw.exe was used by Windows Defender. I have now a suspicion that it could be a mining trojan. https://howtoremove.guide/taskhostw-exe/
If this is true, how the heck got into my PC and why Windows Defender does not spot it. Clearly, I have to keep an eye on the PC activity
That you should do, and Windows Defender (or any other) does not spot everything. – harrymc – 2019-07-26T12:50:33.363