Network Associates made a previous offer of 0.78 share for each McAfee.com shares.

In 2003, Network Associates renewed the contract for an additional five years at a cost of $6 million.

Network Associates' press release said it was "the first company to offer detection and cleaning."

The irony is that many in the industry wonder when the tables will be turned on Network Associates.

Days later, Network Associates warned that it would miss its earnings forecast.

Shares of Network Associates were down $1.53, or nearly 6 percent, to $25.14.

One, Network Associates, said customers had reported more than 100,000 infected machines.

Network Associates, the anti-virus software company, said its call volume had declined yesterday but was still double the normal rate.

Though Network Associates declined to estimate spending overseas, the company said the account would grow significantly.

Network Associates, which spun off McAfee.com in 1999, said it would take its offer to shareholders.