scvhost.exe virus

Do you have access to another clean machine to download files ?

If so you could try a bootable AV scan
Windows Defender Offline

I would recommend using a clean pc to download and burn a disc then boot the infected machine from it

Download these two programs below

32-bit Version OS http://download.bleepingcomputer.com/farbar/FRST.exe
Right click on FRST.exe and choose
When the tool opens click Yes to disclaimer.
Press Scan button.
FRST will let you know when the scan is complete and has written the FRST.txt to file
Please copy and paste both logs in your reply.(FRST.txt and Addition.txt)

Farbar Service Scanner
Click here Downloading Farbar Service Scanner to DOWNLOAD

Right click on FSS.exe and choose
Place a check next to the following options
Internet Services
Windows Firewall
System Restore
Security Center
Windows Update
Windows Defender
Press: Scan

To Run them :

To run FRST64.exe
Right-click on FRST64.exe choose
When the tool opens click Yes to disclaimer.
Press Scan button.
FRST will let you know when the scan is complete and has written the FRST.txt to file and creates another file called Addition.txt
FRST.txt and Addition.txt will be on the desktop
Upload FRST.txt and Addition.txt with your reply

To run FSS.exe
Place file into your desktop
Place a check next to the following options
Internet Services
Windows Firewall
System Restore
Security Center
Windows Update
Windows Defender
Press: Scan

Farbar Service Scanner will create a log, called FSS.txt, on the Desktop. Upload the FSS.txt with your reply

Layback Bear has a suggestion here/ different virus though,
Cannot disable Ghostery add-on in IE9