I had downloaded Diko then removed it from my computer. I tried to download again and when the download is almost done, I get an error saying: " error occured wjile trying to replace the existing file. Delete file failed: code 5. Access is denied."    Now when I try to play videos thru Windows Media PLayer, I am getting a error daying "xvidcore.dll not found", which is something that never happened before. Any suggestions?