Accidentally got what toolbar?
QUOTE(http://www.liutilities.com/products/wintaskspro/processlibrary/svchost/)
Process File: svchost or svchost.exe
Process Name: Microsoft Service Host Process
Description:
svchost.exe is a system process belonging to the Microsoft Windows Operating System which handles processes executed from DLLs. This program is important for the stable and secure running of your computer and should not be terminated.
Can you boot in Safe Mode (tap the F8 key while booting) or in MSDOS mode?
If you can boot in Safe Mode use System File Checker to restore svchost.exe.
If you can only boot in MSDOS mode, perhaps from a startup floppy, you will have to use Extract and will need some more information regarding the location of the file.
What version of Windows do you have?