Right, but you weren't specific. "I installed recently was FireFox although was able to play the WMP files normally until recently?" You didn't say if the two events coincided. Regardless, my first suggestion stands. Try a System Restore. "So won’t you give this man his wings What a shame To have to beg you to see We’re not all the same What a shame" - Shinedown

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Specific enough to establish the fact that I did in fact recently install FireFox which could have altered something, however I do not know if the events coincide, as I have know way of knowing that at present which is why I asked.

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Open WMP go to tools button on top. click tools, click options, click the files type tab and see if the file type is checked or unchecked. Put a check mark in the empty boxes then reboot. See if this returns the proper extension to those files. There is nothing to learn from someone who already agrees with you.

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Okay, that worked although now they are MPEG files and as before the thumbnail picture of whats on the video has been replaced by the 4 color Windows Media Player icon? Thanks.

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So, did you try a System Restore? "So won’t you give this man his wings What a shame To have to beg you to see We’re not all the same What a shame" - Shinedown

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No, as it seems to be a resource hog and doesn't always fix the problem either from what I have experienced and I normally just reformat if things get that bad, although I could just convert each MPEG file to a WMV file which is a little time consuming with a converter such as WinFF and Windows Media Encoder which work well, however I didn't think that I would have to use them. Maybe they always were MPEG files although I certainly don't remember that being the case and now I cant see the thumbnail picture when the folder view is set to thumbnail, as it just shows the Windows icon symbol instead, does anyone know how to re-enable the thumbnail view perhaps? Thanks.

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You may have installed a program that took possession of those files. When installing you need to read the screens. Some are very intrusive. System Restore is not a resource hog if you use it corectly. You can either remove the restore points periodically of set the percentage for less. In this case it probably would have worked. Reformatting is alot of work. Try imaging your boot partition. Also use multiple partitions.

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No, I actually take the time unlike most and see what changes are being made when programs are installed and yes they can be quite intrusive and like I said the only recent install was FireFox. I am quite familiar with using system restore correctly, just prefer to reformat to avoid any other problems although I always use a ghost image program as well which really makes it very easy.

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