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Virus? Cannot start programmes & "Failure to display security and shut down options"

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Good evening all,

Just to flag that this has also been posted in W7 Support sub-forum here:

Other thread

Re. the instruction thread - the link to DSS doesn't seem to work, and GMER is for 32-bit only. If there's anything I can do to kick things off, please let me know and I'll do it!

I've googled extensively around the issues I am facing, and tried all proposed solutions, but none have worked thus far.

Symptoms:
  1. I have 1-2 minutes of freedom after booting, then I can no longer run new programmes. I also cannot close some programmes e.g. Skype. Tabs in Chrome spazz, flash player dies, and any new navigation ends up with an eternal hanging/loading problem.
  2. Unable to restart/shutdown conventionally (I have to do it physically)
  3. I get the error "Failure to display security and shut down options ..." when I try ALT+CTRL+DEL

Safe mode is absolutely fine, so I assume it's not anything hardware related (though please correct me if I'm being naive). My second drive which runs off XP, which I only use for storage now, boots fine and has no problems.

I have not installed any new drivers, programmes, or otherwise made any meaningful changes recently.

Solutions I've tried:
  • Reset winsock.
  • Shut off all start-up programmes using MSCONFIG.
  • Run virus scan at boot-up, deleted 2 items (win32 installmate ... prob trojans? Was an .exe that I had downloaded but never ran).
  • Run Malwarebytes scan, deleted 1 fairly innocuous item.
  • Run full scan-disk check.
  • Run a SFC scan - no integrity violations.
  • No system restore points exist to roll back to (deleted by a virus, perhaps?)
  • I have tried a totally clean boot, which works fine, but introducing "Services" reverts me back to same problems as before.

For the record, I use Vuze occasionally, but only use highly upvoted or known-to-be-safe torrents. Otherwise I do not engage in any typically risky behaviour e.g. running unknown .exe, visiting spammed links, generally engaging in internet security newbie errors.

I am totally stumped, and naturally thought that TSF's collective genius > mine.

Any help would be warmly appreciated.

Many Thanks,

G

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