After a complex test and specially picked out, we denied bad joiners for WMV. Ultra WMV joiner currently is the best WMV Video joiner, which can join WMV video files perfectly. with this WMV joiner, you can also join WMV with other video formats together,such as join MPEG, AVI, RM, MP4 with WMV, this WMV file joiner also support join video files to VCD/SVCD/DVD image files, and then you burn them into your VCD/SVCD/DVD disk. with this WMV joiner you can even convert video files to other video formats you want.
Guide: How to use the best WMV Joiner -WMV file joinerStep 1: 
Free download WMV Joiner and install it on your computer.
Step 2:Click 
Button to select the video files you want to join
Step 3: Edit the source WMV video files, if you like.
Click on the source file you want to edit, then click
button to edit the selected file, you can set the start time and the end time, as the following picture :
Step 4: Sepcify the directory for output files by clicking the 'Change...' button, or just use the default directory (Note: after successful join, please click Open button to find where the file stored, if you try to find the converted file via other way, you may can not see the joined file)
Step 5: Sepcify other settings for advanced user, you can set output quality, frame rate, TV type, Aspect Ratio, Add letterbox and so on.
Step 6: Click Butt
on to join the WMV video files.
After successful join WMV video files, the joined video files shall be stored in the folder you have previously selected. Download free version
Convinced? 
Buy full version $34.95 now.