When I use the Windows 7 option to convert .wtv to .dvr-ms the converted .dvr-ms files are much shorter in length than the original .wtv files, e.g. a .wtv file with a length of 2:35:58 will be converted to a .dvr-ms file with a length of 29:35. To troubleshoot this I tested a few .wtv files all with the same result. The .wtv files where all on my (E) drive. Next I moved the .wtv files to the (C) and (D) drive and successfully converted the .wtv to .dvr-ms with the original length intact. Does this mean my (E) drive is failing or is there another reason why this is specific to the (E) drive?