if it would be TRUE and GOOD keylogger you wouldnt even notice it
if you mean tibian memory reader, its not that hard but if you ask then better just format pc ^^
(for sure delete all "helpers", ot executables, tibia executables, temporary files, search for newly created files etc and then clean registry, repeat up to unlimited ammount of times if you want ^^
if you would meet any stubborn file use unlocker, on xp it launches when you meet problem with deleting and on 7 you have to manualy launch it from context menu but it can delete huge "do not touch or your pc will break" useless windows dirs with just few clicks, kill processes locking files etc)