Updated from 2:16 p.m. EDT

Shares of

SupportSoft

(SPRT) - Get Support.com, Inc. Report

were among the worst-performing technology stocks Monday after the company cut its earnings and sales guidance for the third quarter.

Excluding items, the software maker now expects earnings of breakeven to 3 cents a share on sales of $11.9 million to $12.3 million. Previously, it forecast earnings of 8 cents to 9 cents a share on sales of $16.7 million to $17.5 million. Analysts polled by Thomson First Call had been expecting earnings of 9 cents a share on sales of $17.6 million. The company said several large deals failed to materialize by the end of the quarter, which led to the earnings and sales revision. Shares of SupportSoft traded down $3.41, or 35.5%, to $6.21.

Siebel Systems

(SEBL)

rose 14% after the company said that third-quarter sales and operating income would come in above analysts' expectations. The software maker expects third-quarter sales of $315 million to $317 million on operating income of $24 million to $26 million. Analysts had been expecting sales of $306.6 million. Looking ahead, Siebel said that it is "comfortable" with analysts' fourth-quarter earnings expectations of 7 cents a share on sales of $342.8 million. Shares traded up $1.15 to $9.34.

Shares of

SunGard Data Systems

(SDS) - Get ProShares UltraShort S&P500 Report

rose 10.6% after the company said it would spin off its data recovery business. The unit, which had more than 2,000 employees and sales of $1.2 billion in 2003, will be spun off during the first quarter of 2005. SunGard said that its full-year earnings outlook of $1.37 to $1.42 a share remains unchanged. Analysts are looking for earnings of $1.41 for the full year. Shares of SunGard traded up $2.58 to $27.

Mobius Management

(MOBI)

fell 15.5% after the company cut its first-quarter sales forecast and warned that earnings results would be below expectations. The software maker now expects to post a first-quarter loss of 5 cents to 7 cents a share on sales of $17 million to $18 million. Previously, the company expected sales of $20 million to $22 million. Analysts had been expecting earnings of 8 cents a share. Mobius said that it failed to book a large deal during the quarter, which led to the shortfall. The deal is now expected to close during the second quarter. Shares traded down $1.41 to $7.69.

Shares of

Pervasive Software

(PVSW)

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fell 18.5% after the company warned that first-quarter results would not meet expectations. The software company expects to post a profit of 3 cents to 4 cents a share, which includes amortization of purchased intangibles of about $0.3 million, on sales of $11.6 million to $11.8 million. Analysts had expected first-quarter earnings of 7 cents a share on sales of $13.6 million. Shares traded down $1.10 to $4.86.

Other technology volume leaders included

Intel

(INTC) - Get Intel Corporation (INTC) Report

, up 28 cents to $21.13;

Oracle

(ORCL) - Get Oracle Corporation Report

, down 3 cents to $11.87;

Sirius Satellite Radio

(SIRI) - Get Sirius XM Holdings, Inc. Report

, up 10 cents to $3.24;

Microsoft

(MSFT) - Get Microsoft Corporation (MSFT) Report

, down 13 cents to $28.12;

Cisco

(CSCO) - Get Cisco Systems, Inc. Report

, up 3 cents to $18.96; and

Lucent

(LU)

, up 1 cent to $3.17.