Cannot see Youtube on IE9

Greetings Techies,
My access to Youtube via IE 9 has become intermittent.
However, it's fine with Google Chrome and Mozilla Firefox.
I have tried disabling the ActiveX Filtering and tried
the Compatibility thing too.
The IE9 version is: 9.0.8112.16421.
The JavaScript is enabled and working (I checked it on
javatester.org). So is Flash.
I have Googled for the problem a million times if I have
done it once. And I have applied all the "solutions"
offered. Nada.
Specs:
OS Version: Microsoft Windows 7 Ultimate, Service Pack 1, 32 bit
Processor: Intel(R) Celeron(R) CPU 550 @ 2.00GHz, x64 Family 6 Model 22 Stepping 1
Processor Count: 1
RAM: 2038 Mb
Graphics Card: Mobile Intel(R)965 Express Chipset Family, 384 Mb
Hard Drives: C: Total - 59899 MB, Free - 8661 MB; D: Total - 54469 MB, Free - 32758 MB;
Motherboard: FUJITSU SIEMENS, ESPRIMO Mobile V5505
Antivirus: avast! Antivirus, Updated and Enabled
Please help,
Thanks