Even if you are exercising great care with email downloads, a top suspect in "slow machine" complaints is "malware".
We'll take a few steps and then get a better look at how your machine is functioning as we progress.
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Please download
ATF Cleaner by
Atribune.
Download -
ATF-Cleaner
Double-click ATF-Cleaner.exe to run the program.
Under Main choose: Select All
Click the Empty Selected button.
(If you use FireFox or the Opera browser
To keep saved passwords, click No at the prompt.)
It's normal after running ATF cleaner that the PC will be slower to boot the first time.
this is due to clearing PreFetch, where Windows loads portions of application that are used frequently so that the owner/user can open the application briskly. In your case, after the first time you open any application that you've previously used, PreFetch will be reset for that application and will open promptly.
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Next download, update, and Run Spybot Search and Destroy
Download Spybot S & D version 1.4
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Next:
Update and Run your onboard AntiVirus utility
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Next:
Uninstall "all" current and old version of JAVA Runtime Environment that you have installed on your machine.
(Uninstall via Control Panel - Add/Remove - JAVA or JRE)
You may have to use Add/Remove more than once to remove all old versions of JRE
Next:
Install the most recent update of JAVA Runtime Environment
download and install from here:
The JAVA item that you want to install is
Java Runtime Environment (JRE) 6u1, located about half way down the page.
Next:
Please go to
http://www.PCPitstop.com, to run the Full Tests
http://www.pcpitstop.com
Full Tests are located/linked as the top item in the left-hand column.
You will be required to register with a valid email address for confirmation and create your own Password.
You will be required to accept an ActiveX component to Run the PCPitstop Tests.
Both are SAFE and FREE.
Once you've run the Full Tests and received the Results pages, you will be provided with a TechExpress Link (last item in the brownish/yellow option box on any results page)
please post the full information of the TechExpress Link.
We'll have a look at the test results together here, to better determine what next steps to take.
Best Regards