Windows Defender Error 0x80501001

Can anyone please tell me if this notice below, which I received from Windows Defender is a problem? I assumed it was, so I chose the "deny" instead of "permit" option from Defender, but that's when I received the error message. Here it is:

Summary:
Services & Drivers Change Occurred
Path:
C:\ProgramFiles\sony\vaiopowermanagement\sonycpu.sys
Detected Changes:
driver: Sony CPU
File:
C:\ProgramFiles\sony\vaiopowermanagement\sonycpu.sys
Advice:
Permit this detected item only if you trust the publisher
Publisher:
Not Available
Digitally Signed By:
Not Signed
Product Name:
Not Available
Creation Date:
12-15-05
Size:
1664 Bytes
Checkpoint:
Drivers

Any advice about whether this is a danger and I was right in trying to
delete it? If I was, what do I do now that I've received the error message?
Thanks.

Hi there.

I was going to suggest you ask your question at one of the Microsoft newsgroups for their product.

But I see you already did: http://www.microsoft.com/communitie...&tid=7221304d-f813-4889-929e-03c6d7793ab2&p=1

If you would like someone to take a look at your System:
"BEFORE you POST" Steps to take Before Requesting Assistance then start another new topic in the Malware Removal Forum

Best regards.

Thanks.