Unable to lower voltage using RMclock

[Alicia]

I have an Acer Aspire laptop, with 32 bit Windows Vista. It runs very hot, I recently measured it at 83 degrees Centigrade using HWMonitor. I followed the undervolting tutorial found here.
http://forum.notebookreview.com/har...arket-upgrades/235824-undervolting-guide.html

However, RMclock will not let me change the voltages. The drop down menus offer no alternative to the voltages they list. I also tried a Notebook Hardware Control, but the options to change the voltage were "greyed" out, I couldn't select the boxes at all. Can anyone please tell me why neither of these programs worked for me? And most importantly, what options I have to undervolt my laptop?

 

[bluezero5]

some notebooks will have those functions forced disabled.
we need to know your bios, model to be totally certain..

but if your notebook is too hot.. try to have a laptop cooler to start with.
those are surprisely effective, in my college days, it helped my notebook to be up to 15'C cooler.

 

[Alicia]

some notebooks will have those functions forced disabled.

I had the sinking feeling it was something to do with that. Hope the info below is what's needed. Is there any way around it if it has been disabled?

Model: Acer Aspire 5335
BIOS Version/Date: Phoenix Technologies LTD V1.08 10/09/2008
CPU Type: Genuine Intel CPU T1600 @ 1.666GHz
VGA BIOS Version: 1659