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MCITP MCSE : Security Specialist 41. Windows Update is a catalog of items such as drivers, patches, the latest help files, and Internet products that you can download to keep your computer up to date. You must be logged on as an administrator or a member of the Administrators group in order to access the Product Updates section of Windows Update for downloading help files. 42. You create an ERD by choosing Choose Start -> Programs -> Accessories -> System Tools -> Backup.  Click on the Emergency Repair button. Provide a blank 31/2 inch Floppy Disk when prompted. Note that in NT, you can create ERD by typing RDISK command. This command is not available in Windows 2000. 43. WINS and LMHOSTS file resolve NetBIOS names to IP addresses, whereas DNS and HOSTS file resolve FQDN to IP addresses. 44. Placing the paging file on different physical disks is optimal. This will improve faster access to the Paging file, and also distribute the load. 45. Some of the important System Monitor counters are: Memory>Available Mbytes: measures the amount of physical memory that is available. Typically > 4MB. If less than 4 MB, consider adding more memory. Memory>Pages/Sec: Shows the number of times that the disk has been accessed, because requested information was not available in memory. If the value of the counter is not below 20, you should add more memory. A value of 4 or 5 is typical. Paging File>%Usage: Indicates the % of allocated page file utilization. Should be less than 99%. Processor>%Processor Time: measure the time that the processor is busy. Should be typically less than 80% Processor>Interrupts/Sec: Indicates the average number of hardware interrupts that the processor receives each second. If more than 3,500, you can suspect a program or faulty hardware. PhysicalDisk>%Disk Time: Measures the amount of time that the physical disk is busy servicing read or write requests. If more than 90%, you can improve the performance by adding another disk channel. PhysicalDisk>%Current Disk Queue Length: indicates the number of pending disk requests that need to be processed. The value should be less than 2. The disk problems might arise from less memory, resulting in usage of excessive paging. Ensure that the memory is sufficient before attending to the disk problem. LogicalDisk > %Free Space counter: Indicates the amount of logical disk’s free disk space. Typical value is 10% or above.