Video playback is not smooth while playing via USB 1.1

Sounds like the video file didn't copy correctly. Try and copy the file again and then try to play it again.

"Bravia Engine 3; built-in FM radio and clock; onboard JPEG, MP3, MPEG-1 and MPEG-2 playback via USB; 1080p24 input-ready; Bravia Sync (HDMI-CEC); dual HDMI terminals."

Are you playing the video directly form the hard disk in the camcorder or are you transferring the file to the laptop first? Reading high volumes of data via USB is slow and the PC may not be able to read the data fast enough from the camcorder. Try copying the video to the laptop first, then play it back.

look here
http://www.voxxsupport.com/images/manuals/RT2770/media/RT2770_UMEN.pdf

USB Device Playback Features
(Only support MP3/WMA file)
1. Press USB on front panel or remote control
to select USB mode.
2. Press to start playback or press to
pause playback.
3. Press to end playback.
4. Press CH+/- on the remote control or /
on the front panel to skip to the previous or
next file.
5. Press REPEAT on the remote control to select
repeat mode. (REPEAT ONE, REPEAT FOLDER,
REPEAT ALL, REPEAT OFF)
6. Press RANDOM on the remote control to
select random play mode. (RANDOM ON,
RANDOM OFF)
7. Press INTRO on the remote control to turn
on/off intro mode. The unit will play the first
ten seconds of each track on the USB device.
8. Press DISPLAY on the remote control to
select among mp3/WMA ID3 information,
elapsed time,current play Folder and Track
number and Play Mode.

To transfer camcorder video to computer, you need the following:- 1. Firewire cable (it looks similar to the USB cable, but has very high speed capability)
2. Appropriate software/application.
If a firewire cable did not come with your camcorder then see that purchase one right away, ‘cause you will always need it for this purpose. Then you should have a video editing software like Adobe Premiere or Ulead installed on your system. Adobe Premiere is recommended for its speed.
Once you have these in place, all you need do is connect the camcorder to your computer via firewire, have your video editing application/program open, and simply playback. You will observe that the playback on the camcorder is at the same time being shown on the computer screen within the application. While the mini DV tape is playing back click on capture on the video editing application you are doing the playback from, i.e. Adobe Premiere, Ulead etc.

Can you be more precise? You don't need USB driver for this PC...

Sound card driver for
Realtek AC97 Audio CODECs Driver v4.06 Windows 98SE/ME/2000/XP/2003(x32/x64)
http://www.opendrivers.com/driver/286655/realtek-ac97-audio-codecs-driver-v4.06-windows-98se-me-2000-xp-2003(x32-x64)-free-download.html

i have a mino that only started doing this when it was upgraded via the usb. any help?

it's probably the codec you're using. divx works nicely.

For best results I recommend downloading the video files to PC first and then playing them.