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\.
Viewing Logon Events. After enabling this setting, Windows will log logon events â including a username and time â to the system security log. To view these events, open the Event Viewer â press the Windows key, type Event Viewer, and press Enter to open it.Look for events with event ID 4624 â these represent successful login events.To see more information â such as the user account that logged into the computer â you can double-click the event and scroll down in the text box.ook for events with event ID 4624 â these represent successful login events. To see more information â such as the user account that logged into the computer â you can double-click the event and scroll down in the text box.