See if this works for you:
1. Click Start, and click Run. The Run dialog box appears.
2. Type regedit and then click OK. The Registry Editor opens.
3. Navigate to the key
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Run
4.In the right pane, delete the value that refers to a file that was detected as infected by W32.Magistr.24876@mm.
To edit the Win.ini file:
1. Click Start, and click Run.
2. Type the following, and then click OK.
edit c:\windows\win.ini
The MS-DOS Editor opens.
NOTE: If Windows is installed in a different location, make the appropriate path substitution.
3. In the [windows] section of the file, look for the line that begins with
run=
4. To the right of the equal (=) sign,look for text that refers to a file that was detected as infected by W32.Magistr.24876@mm.
5. Delete this text.
6. Click File, and click Save.
7. Exit the MS-DOS Editor.