download
Primer eReader Drivers & Firmwares (you need to install file, get img file)
or
MiGear eReaders
You need img file from one of them.
http://marketing.prestigio.com/$Customer_Support/Drivers/eBook-Reader/PER3052BW/
download
RK28DM_Setup.exe
install, open, connect device, open img file. and update.
it's done