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Is the file %SysDir%\DLLCACHE\BEEP.SYS located on your computer? Then your computer is infected.
We do suggest you should remove %SysDir%\DLLCACHE\BEEP.SYS from your computer as soon as possible.
%SysDir%\DLLCACHE\BEEP.SYS is Trojan/Backdoor.
Kill the process %SysDir%\DLLCACHE\BEEP.SYS and remove %SysDir%\DLLCACHE\BEEP.SYS from the Windows startup.
%SysDir%\DLLCACHE\BEEP.SYS Information and Removal:
%SysDir%\DLLCACHE\BEEP.SYS is Trojan/Backdoor.
Kill the file %SysDir%\DLLCACHE\BEEP.SYS and remove %SysDir%\DLLCACHE\BEEP.SYS from Windows startup.