As a consequence of the deficiency in CD40 ligand, the T-lymphocytes in patients with X-linked Hyper IgM (XHIGM) are unable to instruct B-lymphocytes to switch their production of immunoglobulins from IgM to IgG, IgA and IgE.
Windows event logs are also files, but they are commonly locked by Windows (Event Log Service) and it is impossible to open these files on live system. But if the computer is started from another disk or the system drive from the analyzed machine is connected to another computer, you can read event logs as files. The default location of event logs on Vista/2008 and better is C:\Windows\System32\winevt\Logs\.
1 Open Event Viewer in the Administrative Tools window. 2  Expand Windows Logs and then select System or any of the other logs Windows 7 collects. 3  Double-click one of the logged events in the top center pane of the Event Viewer to see details about the event.o youâve got some funny business going on with your computer and you canât find out whatâs causing the problem. This guide shows you how to use the Event Viewer to check your computerâs logs to hunt down any problems.