your mp3 is very similar to mine...maybe you have same problem...
 

your mp3 is on adfu mode...When you use the adfu.inf that comes in windows....your mp3 is not recognised...the devices is
USB\VID_10D6&PID_FF76\5&2E64F456&0&3 for AK2025...you can edit the adfuupdate.inf...and add this device..
or you can download the mp3 tool 5.3 that comes with a driver for ak2025. When your pc is on adfu mode you can try to
replace the firmware...maybe thats your problem...your firmware is corrupted...If your mp3 comes with the firmware
is very easy to try to restore your mp3...If you don t have the firmware...you can go to

http://bbs.mydigit.cn/read.php?tid=127829

in this site you can download ak2025...firmwares....

I try to update my firmware with 5.3 version and these firmware but I got error and the program exit...So you can try
...may be your are lucky...

Hi..searching for a way to revive a dead AK2025 Nano lookalike got me here.

I have gone over the few threads here and tried the metal tweezers thinggi but the screen still stays on that hourglass. Plugging into a PC got me an unknown device. I tried to use the ADFU driver but it does not recognize the device. What's short of putting it in the bin?

Thanks.