Have you ever installed Fiddler? If not, the software giving you problems is almost certainly not made or owned by Telerik and the company that makes it has no relationship with Telerik. Telerik makes a product called “Fiddler” which is a web debugger. The Fiddler Web Debugger is NEVER installed by any other software and is only installed when explicitly downloaded and run by a web developer who needs it. I’ve asked our legal team what, if any, action we can take against the company making the software that is causing you problems to get them to stop misusing our trademarks.
While I can’t be certain, from your description, it sounds like you have an adware package called “Browser Safeguard” (or “GeniusBox”) installed, and this is interfering with your web browsing activities. This adware is commonly bundled with other free software downloaded from the web, not with legitimate software like McAfee or similar.
In order to get your system back to a clean state, there are three steps:
1> Find and uninstall the adware software.
2> Reset your system proxy settings.
3> Remove any unwanted certificates.
These steps must be performed in this order.
First, you should use the Programs and Features applet to see whether there is an entry for the unwanted software. You can find this by searching in the Settings or by hitting Windows+R and typing appwiz.cpl:
Sort the list by the Installed on column to find the unwanted software, select it, and click Uninstall.
After removing the software, you may be asked to reboot your computer.
After that, you may need to update your browser’s proxy settings. Inside Internet Explorer, click Tools > Internet Options > Connections. Click the LAN Settings button. Uncheck all of the boxes on that screen (if any are checked) and click Ok. Now your browser will not attempt to use the adware’s proxy.
Lastly, you may choose to uninstall any certificates that the adware created (although this is strictly optional, as the certificates won’t do anything without the adware installed.) To do so, hit Windows+R and type certmgr.msc and hit Enter. In the window that appears, click the Personal folder and the Certificates folder inside it. Select all of the certificates with an Issued By column containing DO_NOT_TRUST… and then hit the Delete key on your keyboard.
Choose Yes when asked to confirm this deletion.
After completing these three steps, the adware should be gone and your system should be in its normal configuration.