Uninstall any other scanner first using their uninstall program and then check add/remove programs. If still there in "ALL PROGRAMS", delete the folder from the C: Drive. 1. Uninstall HP Full Solution 2. Restart 3. Add/Remove Programs-Remove programs from there. 4. C://Program Files/Common -delete HP folders from there. 5. C:// -delete HP folders from there. 6. Start, run - TWAIN_32 - delete everything except wiatwain.ds 7.Start, run - %temp% - delete all files. 8. Empty recycle bin 9. Reboot and then re-install HP Full Solution. 10. Re-install any other printers with the printing driver only!!!!...