That sounds like an virus or something infectious. :( Have you Googled=20
for "windows 7 screensaver cpu usage")
Here's a couple of looks interesting:

http://social.answers.microsoft.com/Forums/en-US/w7desktop/thread/60dc389c-=
1b70-45df-85de-5a3e2864f18f
http://blogs.kraftkennedy.com/index.php/2009/11/17/think-that-screensaver-d=
oesnt-matter-in-your-virtual-machine/
This is just  a quick look.
Apparently from the number of pages, this is a common problem.

On 2/11/2011 2:58 PM, Joe Koberg wrote:
> On 2011-02-11 13:52, Gerhard Fiedler wrote:
>   =20
>> You say that you want this device plugged in at all times, which
>> basically means that you want your screensaver off at all times, right?
>> So... why don't you deactivate it?
>>
>>     =20
> I wish I could!   The controls are unavailable.
>
> To add injury to insult, the "forced" screensaver pegs the CPU when it
> runs.  Consuming an additional 25 watts on my laptop.
>
> Joe
>
>
>   =20
--=20
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