How can I retrieve files that I had to delete from WIN XP?

I recently upgraded from WIN 98 to WIN XP. I installed Norton Antivirus and updated virus definitions. But after a few days my PC got infected with W32.JEEFO virus. But Norton could not disinfect it. Then I tried a small utility called Resolve from www.sophos.com. It disinfected almost all the files leaving 5-6 files which had to be deleted. Two of these files are as follows :

C:\Windows\svchost.exe

C:\Recycled\nprotect\00001899.exe

Now in Windows 98 there is a utility called System File Checker through which we can retrieve deleted files. Is there a way in WIN XP also to retrieve deleted files ? I could only find System Restore but that will not help.

These files were not deleted accidentally. I had to delete them because they were infected. They were all EXE files, may be system files. I want to retrieve those missing files for Windows from system or from Windows CD. But I couldnot find a utility in WIN XP to do that.