help need badly

someone pls help im doin the quest seirens treasure and im in a party and then i jez sudeenly disc and i restart but it disc again pls help
6/23/2011 1:42 PM - Could not complete auto updates, Some functions may not work correctly. Please restart the launcher to try again.


Error: The process cannot access the file 'C:\Program Files (x86)\NCsoft\Aion\bin32\d3d8thk.dll' because it is being used by another process. System.IO.IOException: The process cannot access the file 'C:\Program Files (x86)\NCsoft\Aion\bin32\d3d8thk.dll' because it is being used by another process.
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, String msgPath, Boolean bFromProxy)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options)
at ￾‡ˆ”‘‰‡†‹￾‡Ž‡‡”Œ’‡ˆ“Š‰￾ˆ’‰”￾‰†”’“Œ￾’.‘‰￾‘￾‘‹ˆ‘†’‡•Š￾”‰￾†￾‹￾‡•†￾Œ“•”†’‡￾‡‹.†Š“￾‹￾”’‰”Š‘ˆ￾￾￾‹￾ˆ‰•‡‘’•Ž‹‰•‘’ŠŽ”￾‘(Object )
at ￾‡ˆ”‘‰‡†‹￾‡Ž‡‡”Œ’‡ˆ“Š‰￾ˆ’‰”￾‰†”’“Œ￾’.‘‰￾‘￾‘‹ˆ‘†’‡•Š￾”‰￾†￾‹￾‡•†￾Œ“•”†’‡￾‡‹.‡†•ŠŠŠ‹￾“‘”Š￾‹Š￾￾‰‘‡‹”•’†’￾‹‘”ŠŒ’ˆ”“(String , •ˆˆ￾Œ“‹￾ŒŠ‘Ž‰•ˆŽ”￾￾‹‰‡‡‡￾￾‰’Œ‡Ž‰’￾ˆ’ )
at ￾‡ˆ”‘‰‡†‹￾‡Ž‡‡”Œ’‡ˆ“Š‰￾ˆ’‰”￾‰†”’“Œ￾’.‘‰￾‘￾‘‹ˆ‘†’‡•Š￾”‰￾†￾‹￾‡•†￾Œ“•”†’‡￾‡‹.”ŽŽ†‘￾‹Ž￾‘Ž￾Š‘•‘“•‘”Š￾†’‰￾￾Œ•Ž•‰“￾‡Œ(String , •ˆˆ￾Œ“‹￾ŒŠ‘Ž‰•ˆŽ”￾￾‹‰‡‡‡￾￾‰’Œ‡Ž‰’￾ˆ’ )
at ￾‡ˆ”‘‰‡†‹￾‡Ž‡‡”Œ’‡ˆ“Š‰￾ˆ’‰”￾‰†”’“Œ￾’.•ˆˆ￾Œ“‹￾ŒŠ‘Ž‰•ˆŽ”￾￾‹‰‡‡‡￾￾‰’Œ‡Ž‰’￾ˆ’.Š￾￾”￾’“￾￾‡￾‹‘‡‹Ž‰’￾‘‡Š†￾‘￾‡”‰“‹†ˆ‰￾Ž(Object , EventArgs )