Why does my computer slow down after few hours of running?

My computer works perfectly fine until it runs for 2~3 hours. Then it starts to lag and slows down like hell.
I’ve asked other people about it; apparently theirs work fine well into 5~7hrs.
What gives? and how do I fix my computer?
Help!

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9 Responses to “Why does my computer slow down after few hours of running?”

  1. t12_incomplete said:

    give us some specs on Ram maybe a refresh of ram will work or its you ISP contract? Maybe some house keeping is required?

  2. Brandon said:

    Do you have a proper cooling source? If your do not have sufficient amount of fans in your computer to support your processor, it will slow down. Either buy additional fans or change your current fans to stronger ones.

  3. Blue said:

    You can use a registry cleaner to clean up your computer and then make your computer faster,Why?the reason is that there may be some registry errors and remnant,corrupt files and temp files in your computer to cause “computer slow”.
    Every time you install and uninstall software on your computer and surfing online you create junk in the computer registry.over time, the registry can grow to enormous proportions, especially if the various programs you’ve installed do not do a good job of deleting and/or updating it’s Registry entries.You need to scan and clean your computer with registry cleaner to make it fast.Good Registry Cleaner will improve your computer and Internet performance dramatically!
    There are some comparison and review of TOP 5 registry cleaners.
    http://www.speed-up-my-computer.com
    You can download and scan your computer for free.

  4. Table said:

    Go to http://www.pc-optimizer-pro-downloads.com
    With pc optimizer pro you can safely clean, repair and optimize your computer.
    It will help improve your system performance.

  5. rasor said:

    You can try the following-

    1) Scan for viruses and spyware , I recommend AVG and Spybot. But dont run two AV programs at the same time.

    2) Reduce the number of programs loading at startup. Have only the ones absolutely necessary.

    3)Uninstall programs you may never need and also run a diskcleanup and chkdsk. CCleaner is a great diskcleanup program, its free.

    4) Defragment. Check your HDD free space. The built in defragger needs atleast 15% free space. But better programs like Diskeeper defrag with as less as 5% free space. Whats more, it can be set to run in the background automatically. You can download the free 30 day trial version here-
    http://www.diskeeper.com/defrag.aspx

    5)Ensure that your PC has enough RAM, if not upgrade. 1 to 2GB is the bare minimum nowadays.

  6. HAP said:

    The reason the computer gets slow is due to the registry files becoming corrupted, or messed up, in simple terms. These files tell the computer or laptop how to operate the software installed on the system. If any of these files get messed up, the computer is not sure what to do and this will really slow down the computer. The other scenario is where you download other software, screensavers, pictures, videos, or even music, and this will somehow change the settings on a registry file. When this happens, the original program that needs that file now has the wrong instructions in it. So, it will cause the computer to run slow, or in a worse case, crash.

    You can speed up your computer with a thorough analysis and repair of your registry. The registry Scan will identify corrupt files, paths,and registry keys causing your computer to have errors and run slow.Go to http://www.registry-bot.com to download registry bot.It is the most advanced and comprehensive registry repair product on the market.It will speed up your computer and make windows startup faster.
    http://www.registry-bot.com free download Registry Bot.

  7. cola said:

    If almost all data access (opening of files, folders, programs etc) is lagging, you may need to look at your HDD. A badly fragmented drive may be the culprit. Start with a malware scan then, run a diskcleanup and defragment, if your free space is less than 15% or if the drive is badly cluttered, a better option may be to set one of the advanced defraggers on the job. Defragging will help improve speed and get rid of the lags.

  8. rajeev ojha said:

    my computer had similar problem. Later on, I found the fan was not good enough and I added an external fan. it is fine now.

  9. dunaev-ay said:




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