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set up a new computer with Windows 7 Pro and it does not run properly

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I am setting up a new computer with a Windows 7 Pro OS. I've downloaded Firefox latest version. The browser continually freezes and/or is extremely slow. I've tried unsuccessfully to sync the new pc to the Mozilla server. In any event, experience has been very poor. I have had years of very good experience on a pc using Windows XP Pro. What can I do to resolve?

I am setting up a new computer with a Windows 7 Pro OS. I've downloaded Firefox latest version. The browser continually freezes and/or is extremely slow. I've tried unsuccessfully to sync the new pc to the Mozilla server. In any event, experience has been very poor. I have had years of very good experience on a pc using Windows XP Pro. What can I do to resolve?

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Add DOZENS of giggs of ram, switch from hard disk to SSD or add inline SSC.

Consult some free experts about potential malware infestation: BleepingComputer.com

In windows control panel is an option to rate performance of your computer. What number does the applet rate your computer?

http://windows.microsoft.com/en-US/windows7/What-is-the-Windows-Experience-Index