Hi, Notepad is my default application for opening .txt files. But from last 2-3 days whenever i click on a txt file it gives an error. Notepad has caused an error in executble notepad.exe Application will now quit. My notepad executable is perfectly ok and it works file when i open it using run command box or from start menu Also when i open a file from nopetad,s File>>Open it works fine. .I even replaced the notepad executable (c:\windows\notepad.ex) but the problem is not solved.It still gives error. What could be wrong???