Shares of

Secure Computing

( SCUR) were among technology's winners Tuesday, rising 12.8% after the company raised its first-quarter earnings and sales estimates.

The network security company now expects earnings of 11 cents a share on sales of $25.5 million, up from previous guidance of 8 cents to $24.3 million. Analysts polled by Thomson First Call were expecting earnings of 8 cents a share on sales of $24.4 million. A year ago the company earned 6 cents a share on sales of $21.2 million. The company expects to post first-quarter results on April 21. Shares traded up $1.04 to $9.16.

Altiris

(ATRS) - Get Report

fell 19.2% after the company warned that first-quarter results would fall short of expectations. The provider of IT management software expects pro forma earnings of 17 cents to 18 cents a share on sales of about $46 million. Analysts had been expecting earnings of 21 cents a share on sales of $46.4 million. Increased costs associated with hiring, higher-than-anticipated general and administrative costs and higher legal and compliance expenses led to the first-quarter outlook. Shares traded down $4.60 to $19.36.

Shares of

Virage Logic

(VIRL)

fell 16.3% after the company warned that second-quarter results would fall well below its previous estimate. The provider of semiconductor IP platforms now expects to post a loss of 3 cents to 4 cents a share on sales of $12.3 million to $12.7 million. In January, the company said it would earn 9 cents a share on sales of $16.3 million to $16.6 million. Analysts had been expecting earnings of 9 cents a share on sales of $16.4 million. The company blamed the lower forecast on softness in the market, which led to delayed customer purchasing. Virage expects to report its second-quarter results on April 21. Shares traded down $1.76 to $9.04.

Mentor Graphics

(MENT)

fell 26.5% after the provider of automation software cut its first-quarter earnings and sales outlook. Excluding items, the company now expects to post break-even earnings on sales of $165 million, down from previous guidance that called for earnings of 5 cents to 10 cents a share on sales of $177 million. Analysts had been expecting earnings of 8 cents a share on sales of $176.5 million. Mentor said it experienced year-over-year weakness across all product lines and all regions. The company expects to post full first-quarter results on April 26. Shares traded down $3.61 to $10.04.

Shares of

Navarre

(NAVR)

fell 8% after the software company terminated its planned notes offering. The company said it canceled the sale of $125 million in senior notes because of recent weakness in the bond market. The company, it said, still expects to complete its acquisition of Funimation prior to May 15. Shares traded down 59 cents to $6.77.

Other technology movers included

Microsoft

(MSFT) - Get Report

, up 24 cents to $24.47;

Lucent Technologies

( LU), down 9 cents to $2.53;

Cisco Systems

(CSCO) - Get Report

, up 15 cents to $17.82;

Intel

(INTC) - Get Report

, up 20 cents to $23.13;

Oracle

(ORCL) - Get Report

, down 24 cents to $12.45;

Sirius Satellite

(SIRI) - Get Report

, up 14 cents to $5.59; and

Applied Materials

(AMAT) - Get Report

, down 3 cents to $16.02.