Firefox and Chrome Javascript issues

I recently upgraded my Lenovo ThinkPad W530 to Windows 8 Pro 64 bit and installed Firefox 20.0.1 with the latest verision of Java 7 update 21. I recently began having issues with a site we use all of the time including ESPN's "My ESPN" tabs which use javascript. The drop down menus no longer work and on some sites, no scroll bar appears. I have the same problem with Chrome but not IE10. I have already tried the following:

-Start FF in safe mode with all add-ons disabled
-Reset FF
-Re-installed FF with removing the profile settings
-Tried older versions of FF and Java
-System Restore to working date
-Disabled any and every security feature

I am at a loss and I can't use IE10 for our company's site and IE9 is not supported on Windows 8. Any ideas?
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Post a link to your site here in order to let us have a look, too.
One differece between Chrome and IE is that Chrome needs a precise layout of DIVs in the pages' HTML, for example. If it is not respected, you may not see some objects.
emconsultingAuthor Commented:
I cannot post a link to the site. The issue only occurs after logging in. It happens on as well. I attached the menu that doesn't work.
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maybe the yavascript is disabled in your browser.
emconsultingAuthor Commented:
Says it is enabled under "Options"
You can also check your page with the in order to see if some contents are not loaded because of HTML error.
emconsultingAuthor Commented:
The issue was ultimately related to Lenovo's bloatware installed on the machine causing the browsers to not process javascript. I am not sure exactly which Lenovo app was the cause because I wiped them out all at once. I had already invested way too much time thinking it was something else.

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emconsultingAuthor Commented:
I resolved this myself by removing the Lenovo bloatware.
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