microsoft seeking spyware trojan microsoft is investigating a trojan program that attempts to switch off the firm s anti-spyware software.  the spyware tool was only released by microsoft in the last few weeks and has been downloaded by six million people. stephen toulouse  a security manager at microsoft  said the malicious program was called bankash-a trojan and was being sent as an e-mail attachment. microsoft said it did not believe the program was widespread and recommended users to use an anti-virus program. the program attempts to disable or delete microsoft s anti-spyware tool and suppress warning messages given to users.  it may also try to steal online banking passwords or other personal information by tracking users  keystrokes.  microsoft said in a statement it is investigating what it called a criminal attack on its software. earlier this week  microsoft said it would buy anti-virus software maker sybari software to improve its security in its windows and e-mail software. microsoft has said it plans to offer its own paid-for anti-virus software but it has not yet set a date for its release. the anti-spyware program being targeted is currently only in beta form and aims to help users find and remove spyware - programs which monitor internet use  causes advert pop-ups and slow a pc s performance.