Text doesn't appear immediately

I’m having trouble with eM Client. When I try writing up an email, the letters do not appear onscreen till a few seconds later. It is the same with when deleting sentences or words, the action does’t occur at the same time. I have installed the em client database check and it has encountered an error and has said to contact em client with the following information:

System.IO.IOException: The process cannot access the file because it is being used by another process.
   at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
   at System.IO.__Error.WinIOError()
   at System.IO.File.InternalMove(String sourceFileName, String destFileName, Boolean checkHost)
   at DbRepair.CorruptionChecker.CheckCorruption(RepairOptions repairOptions, CancellationToken token)
   at DbRepair.CheckingProcess.Check(CancellationToken token)
databaseFile: \accounts.dat   

I hope to hear from you soon!

Is your computer slow on other programs?  take your computer to some one and have it cleaned up.  have them repair your Word Processor /  and that try it again