Security experts are encouraging Internet Explorer users to switch browsers as a result of an unpatched security hole that could be used to steal their data.
The bug was discovered in the browser last week and Microsoft says all versions of its browser are open to exploits of the vulnerability.
It is believed Microsoft will issue a patch for the security hole before its next scheduled patching date of 13 January, but that has not stopped security experts recommending a browser switch.
Rick Ferguson, senior security advisor at Trend Micro, told the BBC, "What we have seen from the exploit so far is the stealing of game passwords, but it is inevitable that it will be adapted by criminals. It is just a question of modifying the payload the Trojan installs.
"If users can find an alternative browser, that is good mitigation against the threat."
Other browsers like Firefox, Opera, Google Chrome and Apple's Safari are not vulnerable to the flaw.
Richard Cox, chief information officer at anti-spam body The Spamhaus Project, echoed Trend Micro's advice.
He said, "It won't be long before someone reverse engineers this exploit for more fraudulent purposes. Trend Micro's advice is very sensible."