Aller au contenu principal

Trouver des solutions pour réparer vos ordinateurs.

Questions au sujet de 15667 Voir tout

Optimizing CPU for best performance after newly installed Windows 7

I have recently installed a new windows 7 in my PC, and my PC in lagging alot (this is really unexpected). This was not before I installed this windows, so please don't suggest adding a new ram. All the ram slots of my cpu are full.

Now when I see CPU meter, i see that my RAM usage is about 75% when I just start my PC. I installed a new windows yesterday and before installing a new windows, the ram usage just after start-up was less than 25%!!!

Currently my CPU have 4 gb of RAM.

This link will tell you more about the specs of my PC:


Répondu ! Afficher la réponse J'ai le même problème

Cette question est-elle utile ?

Indice 0


The link to your dropbox doesn't work, use the share link if you can in dropbox.

Can you make sure you installed the 64-bit of Windows instead of 32-bit version?

You can check this by pressing the Windows / Start button key on your keyboard + Pause button to open the System Information window.


I did 32-bit windows. I'm sure. But still I'll check by the method you just identified.

Did the recent dropbox link worked?


Previously too my PC was working on 32bit OS.


Oh. You need to install device drivers maybe. Have you done that yet?

You get most of them from the motherboard manufacturer. If you can post the model number of your motherboard I can post your links on where to download them. Yep the recent dropbox link works fine.

When you install 32-bit windows on a system with 4 Gigabytes of ram. The operating system can only use 3.2 gigabytes of RAM. Just a heads up. If the CPU (Processor) supports a 64-bit version of windows it is generally recommended to install it on systems with 4 Gigabytes of RAM or more.


Voir 5 commentaires en plus

Ajouter un commentaire

4 solutions

Solution retenue

Another answer (sorry - too long for the comment box):

Well, I'm a bit stumped. To clear something up, you say you were 'deleting' avast? do you mean you were uninstalling it, from Control Panel>Programs and Features? I hope so!

As for why you were unable to uninstall it a second time, I have no idea, but that's worrying.

Cached physical memory is data from RAM that has been stored in the swap file (or page file), which is a reserved area on the hard drive. This happens when the RAM becomes full, but the information it holds will be needed again. The fact that the RAM is becoming full upon startup is worrying, because it shouldn't! Windows will automatically manage the page file size, although you can manually set it. Don't bother changing anything to do with this - it's a symptom, not a cause.

My only suggestion at this point would be to reinstall Windows afresh, all over again, this time installing drivers first, and in the correct order.

Download them here:

In the order they appear on the site, download

- Audio

- Chipset

- Graphics

- KB/Mouse/Input

- Network

- BIOS (ROM Firmware for blah blah (International)

- Software - System management>BIOS Configuration Utility

Download each driver to its own folder, and name the folder. Often, driver setup files aren't clearly named after what they actually are.

Omit any I haven't mentioned - you won't need them (unless you use the dial up modem). Store the downloaded files on a USB stick or CD.

Save any personal files you want to keep, as the drive will be wiped.

Reinstall Windows afresh, and leave out your network cable (if you use one). At the drive options screen during installation, delete all partitions, and just click next - Windows will do the rest.

When Windows boots for the first time, DON'T connect to the internet - we don't want any wrongly identified hardware, and therefore incorrect drivers, so no ethernet, and no Wi-Fi (if you have it).


First thing to do is create a System Restore point that we can revert back to if anything goes wrong.

To create a restore point:

- Open System by clicking the Start button, right-clicking Computer, and then clicking Properties.

- In the left pane, click System protection.

- Click the System Protection tab, and then click Create.

- In the System Protection dialog box, type a description, and then click Create.

Insert the USB or disk with the drivers, and copy them all to your you hard disk - your desktop, if you like.

Run the installers from the location you copied them to, not directly from the USB stick or CD/DVD.

Install the drivers in this order:

- Chipset

- Graphics

- Network

- KB/Mouse/Input

- Audio

Now, we MIGHT not need the BIOS configuration utility, as the actual BIOS firmware seems to come as an .exe, which means you should just be able to run it. BIOS is the low level firmware that runs when the computer turns on, and having it up to date is often vital to the operation of many aspects of the computer.

Run the BIOS (ROM Firmware for blah blah (International) .exe file.

During the BIOS flashing process (flashing means writing the firmware to the BIOS chip), DO NOT QUIT THE PROGRAM, AND DO NOT TURN OFF THE COMPUTER! If you do, the motherboard will probably be useless. Don't be deterred, though - do go ahead with this, as the current BIOS is only from last year. Not bad for a five year old machine. Anyway, the BIOS flash should take no more than five minutes, and the computer should restart itself when done. When it does, you might see unusual behaviour, as the BIOS will complain that settings have changed. Just press the key it says to continue - usually F1, or F2.

After all that, check how the system resources are doing. Any improvement? Still ok? If so, connect to the internet. If you need to install a Wi-Fi adaptor driver, do that now.

Go Control Panel>Windows Update, and let Windows download all the updates it can find. This will take a LOOOONG time for Windows 7. I installed Windows 7 from disk for someone last week, and all the updates took over a day. It was looking for the first lot of updates for over four hours, before it came back, so be prepared to leave your machine overnight while it searches. Ok the updates (in the morning, probably!), and let them install. Just to be safe, don't use the machine while it's doing these updates - leave it alone. You will need to approve a load of multiple updates, multiple times, so be patient.

When Windows finally says that there are no more updates, review your system performance. How is it? If ok, good! At this point, create another System Restore Point.

Then attempt to install the latest version of Avast.



Cette réponse a-t-elle été utile ?

Indice 1


Thanks alot.


Ajouter un commentaire
Réponse la plus utile

Hi Salman,

It's very likely that you will need to install the correct drivers for your computer, after installing Windows afresh. Windows 7 will attempt to automatically download ones it knows about, but it's quite common that it is unable to find the correct ones.

Go to Device Manager (right-click 'My Computer' and choose 'Propeties', then 'Device Manager'. Are there any items that have exclamation points or triangles by them? Anything saying 'Unidentified'? If so, this is more than likely the problem.

if this is a laptop, go to the manufacturer's website, and look for it in the 'Support>Drivers' section.

Similarly, if it's a branded desktop, do the same. If it is a custom built machine, you will need to to identify the motherboard, and go to the motherboard manufacturer's site to get the drivers. Usually there will be drivers for the chipset, disk controllers, power management, and so on.

Hope that helps.

PS a small thing, but a matter of 'nomenclature', I daresay: many people refer to the tower, or main 'box' that the computer is in as the CPU. This is incorrect: the CPU is the main microchip on the motherboard. What I think you are refering to is simply 'the tower', or case - or just 'the computer'! The CPU doesn't have RAM, as such. You would say that the motherboard has RAM, if anything. A CPU does have on-board cache memory, but this isn't referred to as RAM.

Cette réponse a-t-elle été utile ?

Indice 1


Thank You @deathonredbull for your guidance. But When I go to the deive manager there are no exclamation or triangles, nor is there anything as "unidentified"

And yes, I am not expert this these things, but till now I used to refer My Whole desktop PC as my CPU.


Ajouter un commentaire

Ok, just because there are no missing drivers, it doesn't mean that generic drivers aren't being used. I would still bother to try and download the correct ones to be sure.

To find your motherboard model, open a command prompt (type 'cmd' on the Start menu and press Enter), and type (or paste) this (no speech marks):

'wmic baseboard get product,manufacturer,version,serialnumber'

If installing the correct drivers makes no difference to the slowness you're seeing, something else must be the cause.

With regard to what ETHREAL1 said, he's right that 4GB of RAM can't be fully used in a 32 bit OS, but my view is that an older dual core CPU like yours isn't really good enough to run 64 bit, so I think you're made the right choice going with 32 bit.

You said that all the RAM slots are full. If you have 2 slots, you must have 2 x 2GB. If you have 4 slots, you must have 4 x 1GB. Either way, the RAM should be operating in full dual channel mode. If you were to up the amount to 6GB, I'm pretty sure you would need 4 slots, and 2 x 2GB + 2 x 1GB for full dual channel. Otherwise (providing the board supports Intel Flex technology), only the first 4GB would be in dual channel, and the rest wouldn't. It's always best to go for RAM amounts that can be halved to an even number, to maximize on performance and upgradeability.

PS No judgement being made - just asking, as many of us have done it at some point, but is the version on Windows 'legit'? I ask, because there are many copies with malware or viruses injected - you don't know what you're getting. For peace of mind, I'd recommend not doing that, but no aspersions being cast! Something to bear in mind.

Cette réponse a-t-elle été utile ?

Indice 1


Thank you for the reply. This was helpful. The command you gave was not of much use as I already got those details from CPU Z.

@deathonredbull You don;t understand. 2 days back I tried installing Windows 7 for the first time in my life (any windows*). I just wanted to learn how to install a windows. So just 2 days back, before installing the windows everything was fine. So that's why I cannot just believe if someone would say to increase the RAM memory. I am not now saying that increasing the memory won't be useful but shouldn't my perform AT LEAST at the level it was performing 2 back back before windows installation? So that's the thing that makes me to believe there has to be some software issue.

*I have installed 32 bit OS

* I was previously using 32 bit OS

* I have 4 slots with 1 gb of RAM each.

(I didn;t understamnd what you said about operating at full dual channel mode. What does that mean? If I had 6gb RAM why only 4gb would be utilized? Why to go for RAM amounts that can be halved? )


I think we're getting sidetracked by the RAM issue - it's not really central to the point of what's being discussed. If you want to learn more about RAM, dual channel operation, and DDR, see this article:, or this thread, for example:

My question to you is this: is this version of Windows 7 the same version that was previously running, on that same computer? I understand that you didn't install it before, and I understand that either this copy of Windows, some other copy of Windows, or another OS entirely may have been installed previously.

So, to recap (and enquire further):

- What OS and what version was installed before?

- Are you trying to install the same version that was installed before?

- Did the Windows disk come with the computer, or elsewhere?

- Is it just a Windows disk, or some kind of system restore disk, specifically provided with your computer?

- Model of motherboard?


- I was running Windows 7 Earlier. I don't know exactly which version was it. Most probably it was the same Windows 7 ultimate that I have right now. But it was for sure from some other disc. I had to buy a new disc that I used to install Windows 7 Ultimate 2 days back.

Model of Motherboard= HP 2820h


Ah! I Googled your mobo (HP 2820h) and found that it comes in the HP-Compaq dc5800 microtower. I then found your other iFixit post about this: Drivers for HP 2820h motherboard

Ok, so if all the drivers are on, and you have the right ones (which it seems you do), it's got to be something unusual.

Ok, go to task manager, and report back on the name of the process that is causing the high CPU usage. Once we know that, we can make some progress.


Incidentally, do you have an antivirus installed? If so, which one?


Voir 31 commentaires en plus

Ajouter un commentaire

Going on with what "deathonredbull" said you can't do much on 4GB of ram...

I would say a good minimum requirements for win 7 are 2 GHz, dual core CPU and 6GB ram...

Cette réponse a-t-elle été utile ?

Indice 0
Ajouter un commentaire

Ajouter une réponse

Salman Saleem Virani sera éternellement reconnaissant.
Nombre de vues :

Dernières 24 heures : 0

7 derniers jours : 1

30 derniers jours : 3

Total : 587