on
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The file "memo.exe" is known to be created under the following filenames:
%ProgramFiles%\bifrost\server.exe
%Temp%\ixp000.tmp\memo.exe
Try deleting MEMO from those places, but its known to spread, the best thing to do is tackle the problem before formatting. if you can't remove it then format your pc, download malwarebytes or spybot search and destroy.