![]() Enable More Than 4. GB RAM In Windows Vista and 7 3. Bit. This article is written for 3. ![]() Tip: This document is for computers that are restarting or rebooting by themselves and not computers that turn off and remain off. Software issue or error. I have a Dell Inspiron 1564 (core i3 330, 2gb ram) which for the past couple of weeks or so is shutting down without warning only when running on the battery. Home > PC lock Up: Aquarius Soft PC Lock Up Professional The easy and effective way to control your child PC usage time. Aquarius Soft PC Lock Up. Unless explicitly mentioned, Windows 7 and Vista refers to the 3. Operating Systems. Couple of months back, I had blogged about a peculiar Windows 7 issue which could cause a BSOD (Blue Screen of Death) if the system had 4. GB (or more) RAM. Latest trending topics being covered on ZDNet including Reviews, Tech Industry, Security, Hardware, Apple, and Windows.I managed to find a fix for that issue. But, I had another minor niggle to figure out. Although I paid for 4. GB of RAM, Windows refused to use more than 3. GB. If you have 4. GB or more RAM then you are probably familiar with the following screen. Computer Properties displayed installed memory as 4. ![]() Solved Is there a different way to charge a laptop battery without using the charger port? How To Enable More Than 4GB Memory in Windows Vista and Windows 7. Trever alex, same problem is happenning to my laptop is hp g series notbook once i turned it off the next day it wont turn on the light is blinking so i will try it. The computer is either turned off or not receiving power. Reseat the power cable in the power connector on the back of the computer and the electrical outlet. GB but at the same time stated that only 3 GB is usable. So, where did the remaining memory go? As it turns out, chunks of your RAM are reserved for various purposes and are not available to the operating system. For example, PCI Express support will reserve 2. MB depending upon the graphics adapter. Due to this Windows always displays less than 4 GB RAM as the amount of usable memory. ![]() Depending upon your hardware, anywhere between 2. GB and 3. 5 GB of RAM will be available to the OS. But, what if you have more than 4 GB RAM? Even on a system with 3. GB RAM, 3. 2 bit editions of Windows will display less than 4 GB of memory. This is a known limitation of the Windows Vista and 7 x. Microsoft claims that it is not their fault and is instead a limitation of the 3. At first glance this seems correct. GB of RAM (2. 32 = 4. G). However, this is not actually true. The main reason being a feature called Physical Address Extension (PAE). PAE makes it possible to address more than 4 GB of memory using 3. Instead, the registers store linear addresses, which are mapped to physical addresses using the page table. This feature has been available since the days of Intel Pentium Pro. ![]() In x. 86 processors additional address lines are provided so that up to 6. GB can be addressed when using the PAE mode. If you want to learn more about Windows memory addressing, go through Geoff Chappell’s notes. Windows Vista and 7 have two kernels – one which doesn’t use PAE and one which does. They are NTOSKRNL. EXE and NTKRNLPA. EXE respectively. Both of them reside within the Windows/System. Can you guess which one you are using? If you have a modern machine, then chances are that Data Execution Prevention (DEP) is enabled in your system and in that case you are already using the kernel with PAE enabled. ![]() How to Enable More Than 4 GB Memory. Before getting started, keep in mind that this patch involves modifying the kernel. Do no proceed unless you are confident. Most security products will identify these patches as malicious since they modify the Windows kernel. Download the appropriate patch for your system (links at the end of this post). I haven’t tried the Windows Vista patch, but I can confirm that the Windows 7 patch works. The Windows 7 patch is in Russian language. To begin patching click on the big button (refer to screenshot). After this a command prompt window should appear. Press Y. On restarting the system, you should see two entries in the Windows Boot Menu – one being the older configuration and the other being the one with support for more than 4 GB RAM. If you don’t want to be prompted every time, press Win + R, type msconfig and hit Enter. Under the Boot tab, reduce the timeout value (to something like 3 sec). If you wish, you can simply get rid of the older configuration by deleting it. But I wouldn’t recommend this. If you get a water mark (Test Mode) on your desktop after restarting, type mcbuilder. Start Menu and press Enter. Windows Vista Patch. Windows 7 Patch: Step 1 (Click on the button)Windows 7 Patch: Step 2 (Press Y)This patch will allow the OS to use more than 4 GB of memory. However, it does have a limitation – more than 3 GB of memory cannot be allocated to a single application. This patch is mainly targeted at systems with more than 4 GB of RAM. However, in some cases installing this patch on 4 GB systems will also lead to an increase in available memory (which may not necessarily result in performance improvement). This may appear to be a bit strange since Windows 7 and Vista are technically capable of addressing up to 4 GB of memory. Obviously, there is a logical explanation for this behavior. But, I won’t discuss it here. Refer to Geoff Chappell’s notes on Physical Memory Map if you wish to explore the issue in detail. Warning: The patches described in this article are kernel patches. They may result in unexpected hardware issues and expose your system to malicious exploits. Download Links: 4. GB Memory Patch for Vista 3. SP1 and SP2)4. GB Memory Patch for Windows 7 3. Windows restarts without warning. Updated: 0. 5/0. 5/2. Computer Hope. Tip: This document is for computers that are restarting or rebooting by themselves and not computers that turn off and remain off. Software issue or error Since the release of Windows XP, Microsoft designed Windows to automatically reboot each time an error occurs, such as a BSo. D. Although this may be nice for errors that do not occur often, users who have a re- occurring error may want to identify the error to troubleshoot it. Below are the steps on how this feature can be disabled and enabled in Windows XP, Vista, 7, and 8. From the Desktop, right- click on My Computer. Click the Properties option. In the System Properties window, click the Advancedtab or the Advanced system settings link. In Advanced, click the Settingsbutton under Startup and Recovery. In the Startup and Recovery window, uncheck the Automatically restart check box. Click OK. Now if the computer generates an error, it should not automatically restart and should display an error message, most likely a BSo. D. Hardware issue or error. Caution: Some of the steps below require you to open your computer. While working inside the computer, be cautious of ESD. Any failing hardware component in your computer could cause your computer to unexpectedly generate an error or reboot without warning. If you have recently attempted to add a new hardware device, remove that device to make sure it is not causing your issues. Make sure you are not encountering any hardware conflicts by viewing Device Manager for errors. Hardware drivers can also cause this issue. If you have recently installed new hardware drivers, you may want to try an earlier version of those drivers. Additional information and help with computer drivers can be found on our drivers page. If you have updated drivers and removed any hardware that could be causing this issue and the random reboots continue to occur, it's possible that the memory is bad in the computer. Finally, hardware devices that are not installed properly in the computer can also cause random reboots. Make sure all the cables and expansion cards are connected properly inside the computer. The best way to determine this is to disconnect and reconnect all cables and expansion cards. Computer virus. Some computer viruses, such as the blaster virus, are designed to reboot your computer without warning. Usually these viruses make the computer reboot every 5, 1. If you believe your computer has a virus, make sure an antivirus program is installed in your computer and that the virus scanner definitions are up to date. Heat related issue. Most computers today are designed to turn off or automatically reboot if the computer processor, video card, or other devices in the computer get too hot. If you have heard any abnormal noises coming from your computer recently, it could be an sign that a fan is failing which may cause hardware components to overheat. First, verify the fan on the power supply is working by examining the back of the computer and seeing if the fan is moving in general, as well as moving fast and smoothly (e. For all other fans in the computer, you need to open the computer and verify all fans are working (e. Make sure this fan is blowing air out of the laptop and check if you can feel hot air coming from the laptop. You may also consider getting a cooling pad, if you find your laptop is getting hot often. Issue with operating system. If after following each of the recommendations above, your computer still continues to reboot, you are likely experiencing an issue with the Microsoft Windows operating system. To help determine if this is the case, try the steps below. Reboot the computer and enter CMOS setup when the computer begins to boot up. After you have loaded the computer into the CMOS setup, let the computer idle for a few minutes. If the computer does not reboot after idling in CMOS and you have tried the other solutions on this page, you can try activating a previous restore point in Windows before the problem started to occur. If activating a previous restore point does not work, or there are no restore points available to activate, you'll likely need to reinstall Microsoft Windows.
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