On January 12, 2009, KLA-Tencor Corporation (the "Company") issued a press release announcing revisions to the Company's previously issued financial outlook for the second quarter of fiscal 2009 ended December 31, 2008, reflecting further deterioration of the condition of the semiconductor and related industries.

In the press release, the Company also announced that it is in the process of conducting its annual evaluation of the value of its goodwill and intangible assets for potential impairment. Based on the result to date of the Company's continuing evaluation, the Company currently anticipates incurring a material non-cash impairment charge on certain of its goodwill and intangible assets in the second quarter of fiscal 2009. The Company also expects that, in addition to the impairment charge described in the preceding sentence, its financial statements for the quarter ended December 31, 2008 will reflect an increase in inventory reserves (driven by declines in the Company's product build plans and service inventory usage) and an increase in reserves for potential losses relating to heightened risk of non-payment of accounts receivable as certain customers face financial difficulty. The actual amounts of such impairment charge and reserve increases will be communicated along with the announcement of the Company's results for the quarter ended December 31, 2008.

A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

The information in Item 2.02 of this Current Report on Form 8-K and the exhibit attached hereto shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities under that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

(d) Exhibits

The following exhibit is furnished herewith:

Exhibit No.            Description

    99.1    Text of press release issued by KLA-Tencor Corporation dated January
12, 2009