EXHIBIT 31.2

CERTIFICATION

I,   Paul F. Norris, certify that:

1.      I have reviewed this Amendment No. 1 to the annual report on Form 10-K/A of Sonic Solutions; and

2.      Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report.

February 5, 2010

/s/ Paul F. Norris

Paul F. Norris

Executive Vice President, Chief Financial Officer

and General Counsel