Why do I repeatedly have this "Invalid URL" problem?

[kwitel]

For some reason, and this happens quite often, when I search in the address bar in Chrome or IE, no matter what I put in, I get the "Invalid URL" page.

Other times, I will get the "Untrusted Connection" page or the red "Warning!" page that tells me that I don't want to be going to this site.

It happens usually only with major sites like Yahoo Mail, Google Search and LinkedIn.

Also, it happens across all my browsers...FireFox, Chrome and IE.

I cannot for the life of me figure out what it is but oddly it happens on my Ipad too, when using Wifi in my apt.

Could my wireless router be doing this?

Any help/ideas is greatly appreciated.

 

[ThrashZone]

Hi,
I might try some scanners to see if they find anything,
Post which Security suite you have installed,
See if the issue happens using Clean boot,
http://www.sevenforums.com/tutorials/179159-troubleshoot-application-conflicts-performing-clean-startup.html
Post the scan results,
Review Jacee’s instructions to run Adwcleaner here post #7,
Ignore the title of the thread,
http://www.sevenforums.com/system-security/316404-instant-savings-app.html
You can use these free tools to see if they find anything,
Manually Update them before running full scans,
Try not to use your computer while the scans are running, (one at a time of course).
Uncheck the box to Activate the Free trial from the final install options,
http://www.malwarebytes.org/products/malwarebytes_free
http://www.superantispyware.com/?tag=SUPERANTISPYWARE
This one is the longest up to 4 hours, the others are only about 45 minutes,
http://www.microsoft.com/security/scanner/en-us/default.aspx