some jpg and mp4 cannot be viewed anymore

[faye]

Hi,

After installing Windows 8.1 (from 8.0)
some of the jpg can no longer be viewed either by Windows photo viewer or Faststone.

When i open it, it just say, Windows Photo viewer can't open this picture because either photo doesn't support this format .......
For the same file, i can't open it by faststone, internet explorer either.

Secondly, some of the mp4 files are seemed to be corrupted. Only 1 third of the screen area is viewer, the other 3/4 is green screen. Super weirded.

Not sure if it is virus attacked, didn't scan any.

I have tried the "index option">advance>troubleshooting>rebuild, but NO help

Can anyone hint me what i can do?

 

[faye]

one point, the jpg in DROPBOX folder are all OK

 

[code65536]

Photo Viewer doesn't actually decode your images--that is done through the WIC codecs installed on your system. It's possible that you may have installed a third-party codec that overrode the default codec, and this third-party codec is having problems. But I don't know how to check the list of installed WIC codecs...

MP4 video is in a similar situation; Media Player doesn't do the actual decoding, but instead relies on DirectShow filters to do so. And as above, it's possible that you may have installed a third-party filter that overrode the default filter and is now causing problems.

The default codecs/filters for images and videos that come with Windows are pretty good, and but that hasn't stopped some third-party programs from bundling their own (and messing things up in the process)...

 

[faye]

thank you for the input,
is there way i can restore the default setting?

secondly i have tried the "SFC /scannow", but NO help

 

[faye]

i think i may have been hijacked by cryptodefense