i change play back output/internal filter setting a few days ago.... but now i dont know how to set back my default setting.... nothing is working i cant play any files...
all i get is this

CANT OPEN ANY REAL MEDIA FILE WHY????

C:\Documents and Settings\JIMMY\My Documents\a\dvd\Unbalance MENU.1.rmvb::Output 01 (Video Stream)

Media Type 0:
--------------------------
Video: RealVideo 4 640x480 23.98fps 487Kbps

AM_MEDIA_TYPE:
majortype: MEDIATYPE_Video {73646976-0000-0010-8000-00AA00389B71}
subtype: Unknown GUID Name {30345652-0000-0010-8000-00AA00389B71}
formattype: FORMAT_VideoInfo {05589F80-C356-11CE-BF01-00AA0055595A}
bFixedSizeSamples: 1
bTemporalCompression: 0
lSampleSize: 21472
cbFormat: 122

What did you change exactly?

If you had changed the input filters in Media Player Classic: just tick all "Source Filters" and "Transform Filters" (and mainly the "Real Media" source filter & "Real Video", "Real Audio" transform filters) in View/Options/Filters menu.

If you had changed the format settings: see this topic.