Remove globalroot\systemroot\svchost.exe virus

Today, my computer begins to redirect whenever I am searching the Internet. I suspect of some virus infection so I decided to scan my computer. It took almost a half day before my antivirus program found and display a message “Malicious URL Blocked : globalroot\systemroot\svchost.exe”

The message is clear, the file is somewhere in my computer and not a URL. After the scan, the program seems to remove the virus but after restarting the computer, symptoms still persists. Browser is still redirected to unknown sites and Avast detects the presence of globalroot\systemroot\svchost.exe.

How am I supposed to delete this virus and stop the redirect problem? Scanning repeatedly doesn’t resolve the issue even with an updated database and most recent version of antivirus. Please tell me other tools I might need to remove this virus from my computer.

Thanks and regards,