taskhostw.exe has high CPU consumptionm of 99.3%

It may be a genuine file or a virus:
https://www.file.net/process/taskhostw.exe.html
How to recognize suspicious variants?
If taskhostw.exe is located in a subfolder of "C:\Program Files", the security rating is 69% dangerous. The file size is 1,705,984 bytes (66% of all occurrences) or 1,113,088 bytes. The program has no visible window. It is not a Windows system file. Taskhostw.exe is able to record keyboard and mouse inputs, monitor applications and manipulate other programs.
If taskhostw.exe is located in a subfolder of the user's profile folder****0 bytes. There is no description of the program. The program is not visible. It is not a Windows core file. Taskhostw.exe is able to monitor applications.

To be on the safe side:
Try running these programs:
MBAM free: https://www.malwarebytes.com/mwb-download/
Eset online scanner: http://www.eset.com/us/online-scanner/
Adwcleaner: https://www.malwarebytes.com/adwcleaner/

If these do not fully remove the virus/malware then it will be wise to register with a malware removal site to receive dedicated malware removal instructions, an expert will remain with you throughout the process until confirmation that your PC is 100% clean.
Malwarebytes virus/malware removal forum:
https://forums.malwarebytes.com/forum/7-windows...
Bleeping computer malware/virus removal forum:
https://www.bleepingcomputer.com/forums/forum22...

Disclaimer - This post contains reference to non-Microsoft websites and there may be ads on the page for products & services including products frequently classified as a PUP (Potentially Unwanted Product). Please thoroughly research any product / service advertised on the page before you decide to use them. Your discretion is very much advised.