Ask the Expert

Viruses & CMOS

Can a virus reside in a computer's complementary metal-oxide semiconductor (CMOS)? Is there a way to detect that my CMOS memory has a virus? Is there a way to repair a CMOS memory once it is altered by a virus?

Can a jpg file be infected by a virus?

    Requires Free Membership to View

No, a virus cannot reside in the CMOS. A virus can corrupt the data stored in the CMOS, and there are many programs which can verify if this data has been altered from a stored copy. Yes, one can use a program to replace the CMOS data with the original data.

It is possible to store a file in another file (including image files) -- this is called stegnography. However, it is not the same thing as "infecting," as the image file is just used as a container, and the virus would have to be extracted by another program before it could run. Just viewing the image would nor trigger it.

This was first published in August 2001

There are Comments. Add yours.

TIP: Want to include a code block in your comment? Use <pre> or <code> tags around the desired text. Ex: <code>insert code</code>

REGISTER or login:

Forgot Password?
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy
Sort by: OldestNewest

Forgot Password?

No problem! Submit your e-mail address below. We'll send you an email containing your password.

Your password has been sent to: