either you haven’t enabled Explorer to really show you all files (maybe post a screenshot of the setting syou have there ?),
or maybe it’s only created temporarily ?

are you sure you followed all the steps in the PV-procedure ? have you TRIED going through the killbox procedure, even though you can’t see the file in explorer ?

Boot the PC with Win-XP-CD, change to console and navigate with Dir & CD to c:\windows\system32:
try DIR, ATTRIB and DEL on the ctl.dll

also please post the SCAN-log of cwshredder here, and the contents of your host(s)/lmhost(s) files