Those files possibly use a codec that WMP does not support. External codecs sometimes don't support seeking.
Seeing a WMA file with such a codec is not very normal though. Check if your file is damaged. If it is, try re-encoding it. Expression Encoder or WM Encoder (both made by MS) are fine.
Also, try out VLC media player. It plays everything you can throw at it.
P/s: GeekU is running fine. Thanks.
Thanks alot for recommending Expression Encoder and WM Encoder, and for suggesting that I re-encode them. I will try them out today. My employer may not be keen on my installing VLC but I think its a good idea as a backup, at least on the IT machines.
One more question though, how can I tell whether the .WMA file is damaged in the first place (other than the fact that I can't seek through the video/audio)? The video and sound plays from beginning to end. Thanks very much
Edited by 01010011, 15 January 2011 - 08:47 AM.