Tech Industry gains on NBCi pact, virus outbreak shares moved up 3 1/2, or 16 percent, to 25 3/4 Thursday after announcing an alliance with NBCi to provide a variety of PC maintenance services to small businesses through the portal's site., a wholly owned subsidiary of Network Associates (Nasdaq: NETA), will offer its McAfee Clinic software to surfers looking to clean their hard drives, scan for viruses and update their anti-virus software online.

Financial terms of the deal were not disclosed.

The deal will make it easier for customers to buy software from (Nasdaq: MCAF) while increasing traffic to NBCi's (Nasdaq: NBCI) portal site.

NBCi shares fell 1 1/4 to 20 3/4 Thursday afternoon. members will also gain access's information and services in a planned business center on the site. shares stormed up more than 250 percent in its December initial public offering.

However, its shares fell from a 52-week high of 63 3/4 in March to below 16 in April.

In its latest quarter, posted a loss of 14 cents a share on sales of $10.3 million.

Security software stocks got an unexpected boost Thursday after numerous computer systems were shut down by an email virus considered to be far more dangerous than the "Melissa" virus.

Symantec Corp. (Nasdaq: SYMC) shares moved up 1 7/16 to 59 15/16 while Computer Associates (NYSE: CA) and Network Associates (Nasdaq: NETA) shares moved up 7/16 and 1 1/16 a share, respectively.

Analysts expect to lose 14 cents a share in its second quarter and 53 cents a share in the fiscal year.