Microsoft is planning to release a number of patches (9 in total) this Tuesday. Please use the Microsoft Update feature on your systems. I don't know if the updates are applicable to Win 95/98 systems, but, try to update too. Some of the fixes are deemed critical by Microsoft. While you are at it you may want to update your virus scanning software (you do have a scanner don't you?), spyware scanner(s) and firewall software.
For those of you who are running Linux, don't gloat, there are a number of patches you should be applying. Linux.com has an advisory watch section that details the various distributions and the fixes. You can check out Linux.com for the information.