Uninstall all the old versions of Java.

Please go to Jotti's or to virustotal and have these files scanned. Post the results back here.

C:\Windows\System32\uryxmnyd.exe
C:\Windows\System32\afkzcjwf.exe

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Please post the contents of the following folders

C:\Program Files\fnbyyff
C:\Windows\.security
C:\.security
C:\Users\All Users\hchefwvk
C:\ProgramData\hchefwvk
C:\Program Files\ouemijb

If there are any executables and dll files, please scan them online too and post back the results.