avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x89
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0x89
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 3 of 10: not in sync: resp=0x89
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0x89
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 5 of 10: not in sync: resp=0x89
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 6 of 10: not in sync: resp=0x89
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 7 of 10: not in sync: resp=0x89
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 8 of 10: not in sync: resp=0x89
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 9 of 10: not in sync: resp=0x89
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x89
avrdude done. Thank you.
Problem uploading to board. See http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions.
means that you cannot upload any program - not even the Blink example?
yup, not even the blink.
Have you tried closing and restarting the Arduino IDE?
Have you tried shutting down and re-starting your PC?
Have you tried deleting and re-installing the Arduino IDE.
I don't use Windows so if this is a Windows specific problem I can't help.
Have you ever been able to upload a program to the Uno?
Is it a genuine Uno or a clone?
Have you any other Arduino board that you can try? Or maybe you could borrow one from a friend? - just to eliminate the possibility that your Uno is faulty.
Is this your very first time using the Arduino IDE?
Or is this a problem that has only appeared since you installed the latest version of the Arduino IDE?
If the problem has happened after a change of IDE I suggest reverting to the older version. You can also have several versions of the IDE on one PC - the IDE is just a Java program.
Another wild thought - maybe there is no bootloader program loaded on the Atmega 328 chip?