PENWES re appeared

While creating a new job in Task Scheduler to copy some files around I noticed that there's a job called PENWES scheduled to run at the logon of any user.

Back in January I had an infection problem which I reported here and ran the whole cleanup process:

http://forums.majorgeeks.com/showthread.php?t=290437&highlight=PENWES

There's also a folder C:\Program Files (x86)\PenWes with dnshelper.exe and DNSService.exe in it, the folder is dated 23/01/2015 which is before I ran the cleanup, which I thought inculded removing PENWES.

So either it didn't, or I've been reinfected somehow, although I haven't knowingley accepted an install of this thing.

Should I be concerned about it, if so do I need to run the cleanup procedure again?

(running W7 64b Prof, all updates installed, W7 firewall and Avast AV).