Microsoft COM+ is a component system allowing software to communicate. Any software requires sending data inside Windows system may be required to run on top of COM+.

After using the computer for some time, you may see some COM+ failure in the Event Viewer (Right click on My Computer -> Manager->Event Viewer->Application/System). As COM+ can be easily corrupted, Microsoft has already prepared a Knowledge Base(KB) for users to reinstall COM+.
http://support.microsoft.com/default.aspx?scid=kb;en-us;315296

To repair simply error, you can try the following steps:

1. Click the Start button, point to Settings, and then click Control Panel
2. Double-click Add/Remove Programs, and then click Add/Remove Windows Components
3. Click Next to go through the reinstallation process, to reinstall COM+.