Delete some registry virtual keys. . .

◆1. Turn off unused devices. In the device manager, disable uncommon devices such as PCMCIA cards, modems, infrared devices, printer ports (LPT1) or serial ports (COM1). Select "Do not use this device (disable)" in the "General" tab of the deactivated device properties dialog box. Enable these devices from Device Manager when you need to use them. ◆2. Memory performance optimization There are several options in Windows fragments are written to the hard disk, we can prevent it from doing so, allowing the data to remain in memory, thus improving system performance. Only use this setting if the memory is 256M or above. Change the value of "DisablePagingExecutive" from 0 to 1 to disable memory paging. 2) Improve system cache. You must have more than 256M of memory to activate it. Change the LargeSystemCache key value from 0 to 1. Generally speaking, this optimization will greatly improve system performance, but it may also reduce the performance of some applications. 3) Input/output performance Only change the value here when the memory is greater than 256M. This optimization is only meaningful to server users. It can improve the performance of the system when transferring large-capacity files. Create a DWORD (double-byte value) key value and name it IOPageLockLimit. Set the value between 8M and 16M bytes for the best performance. What value should you set? You can try which value can get the best performance. This value is calculated in bytes. For example, if you want to allocate 12M, it is 12×1024×1024, which is 12582912. ◆3. Start the hard disk/optical drive DMA mode "System Properties" - "Hardware" - "Device Manager", select "IDEATA/ATAPI Controller" in the device list, double-click "Primary IDE Channel" or "Secondary IDE Channel" , check whether the DMA mode has been started in the "Advanced Settings" tab of its properties dialog box. Generally speaking, if the device supports it, the system will automatically turn on the DMA function. If it is not turned on, you can set the "Transfer Mode" to "DMA ( If available)" (it should also be set to support DMA in the BIOS). ◆4. Turn off the autoplay function. Run the "Group Policy" program, open "Computer Configuration" in the left column of the Group Policy window, select "System" under "Administrative Templates", and then find "Turn off autoplay" in the configuration column on the right. " and double-click it, the "Turn off AutoPlay Properties" dialog box will pop up, select "Enabled" in the "Settings" tab, and select "All Drives" in the "Turn off AutoPlay" drop-down list. ◆5. Set the second-level cache capacity. WindowsXP sometimes cannot automatically detect the second-level cache capacity of the processor, and we need to set it manually. Run the registry editor, find HKCU_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session\Manager\Memory\Management, select the Dword value SecondLevelDataCache (if it does not exist, create a new value), and modify this value (use decimal when filling in) for your CPU The size of the secondary cache. For example, the secondary cache of your CPU is 256KB. Just modify the Dword value SecondLevelDataCache to 256 in decimal.

Second-level cache size introduction: AMD series Duron 64KBK6-3 Thunderbird Athlon If you are using WinXP, be sure to check: open the registry, find HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows; NT\CurrentVersion. Change the value of "RegDone" from 0 to 1 to complete. This operation is very important, and many strange little problems occur because of this. And the solution. ◆6. Cancel Microsoft’s verification prompt. When installing the driver, a window will often pop up saying that the program has not been verified by Microsoft. We can cancel it in Control Panel - System - Hardware - Device Administrator - Driver Signature. ◆7. Prioritize IRQ interrupt requests. Each major component of the computer has an IRQ interrupt number. The purpose here is to achieve optimization by modifying the priority of each IRQ request. The main optimization object here is the system CMOS real-time clock, which improves performance through the motherboard. First, determine which component you want to get higher performance, and then find the IRQ number that the hardware is using. Open the System Properties in Control Panel, select the "Hardware" tab, and then click the "Device Manager" button. Right-click the component whose IRQ number you want to check, select "Properties", and then click the "Resources" tab. Here you can see the IRQ interrupt number being used by the device (if there is no IRQ interrupt number, select another device). Write down the interrupt number, then run the registry editor Regedit and find the location of "HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\PriorityControl" in the registry. We need to create a DWORD double-byte value named IRQ#Priority (where "#" is the specific IRQ interrupt number) here, and then set its value to 1. For example, the IRQ interrupt number of my system's CMOS real-time clock is 8, and the key name I want to create is IRQ8Priority. After restarting your computer, you will notice an improvement in the performance of your newly optimized components. It is strongly recommended to use this method to optimize the system CMOS real-time clock, because it can improve the performance of the entire motherboard. Of course, you can also increase the priority of multiple IRQ interrupt numbers, but the effect is not that good and may cause system instability. If you want to undo this optimization setting, just delete the registry key you just created.