windows 7 - All my browsers suddenly don't support Javascript files anymore?

I'm experiencing the same issue as this question, which seems to be unresolved. I'll provide more detail, sot that this qualifies as a better representation of the issue. It all started after moving to a new service provider. It also may be tied to Windows Updates.

What is my setup?

• Windows 7 64-bit. Plenty of power under the hood, no driver updates so assuming hardware isn't the cause.

What happens?

• Javascript files are not loaded. By this, I mean on a page the Javascript works, but any referenced Javascript files will not load in ANY browser. Cross-domain or even the same domain. And again, I have tried all browsers...

What have I tried?

• Reboot between about every step. Shutdown often as well, as this has been a 2 week issue.


• I already had Chrome and IE9 installed. I tried using all 3 (IE has a 64-bit option, making it three)


• Made sure no proxies enabled.


• Cleared cache, cookies, all temp files I could find. Issue persists.


• Cleared DNS (ipconfig -flushdns). Issue persists.


• Setup Google Public DNS in router. Also release/renew in router.


• Tried Windows Update, however, it gives an error. I will try to get error later. Microsoft site says Windows Update might be corrupted (if you get that error), so I followed the instructions on their site to create a new Windows update folder. Issue persists.


• Ran Malwarebytes Anti-Malware, no issues. (updated first)


• Full scan of MS Security Essentials. No issues found. (updated first)


• Uninstalled MS Security Essentials, same issue persists.


• I uninstalled Chrome, and installed FF6. Same issue.


• Reset IE, ensured 3rd party extensions disabled. Issue persists.


• Checked HOST file, it looks normal and hasn't been modified in a while.


• Desperation caused me to attempt a System Restore. Sadly, it could only go back a couple days. It was successful in restoring, but failed to fix issue.


• Ran a sfc -scannow. Found nothing, issue persisted.


• Using Firebug for Chrome, specifically saw that it was loading on page javascript but not loading any linked JS files. Seems to load linked CSS fine.


• Found another site that mentioned this might be caused by windows updates. I have began uninstalling windows updates, and am back to mid august. Several more to go, so far haven't found any that have fixed it.

I may have missed a step or two I've done, as this has been going on for at least 2 weeks.

What else can I do to troubleshoot this issue and get an understanding of what's happening?

Answer

This is way out there but have you tried connecting directly into your modem and removing your router as a possible source of problems?

I stumbled on this recently when I was randomly unable to install windows updates from their website. It didn't even occur to me to rule out the router originally as web pages were loading fine.

It just so happened that I was planning on replacing the router anyway. After the swap I noticed I wasn't having the problem any more so I began suspecting the old router as a problem. Sure enough I plugged it back in and after awhile I would experience strange (but non reproducible) errors.

Glad to see you figured it out!