Have you checked the browsers for add-ons/ extensions that could cause the problem?
Use CCleaner to remove Temporary files, program caches, cookies, logs, etc. Use the Default settings. No need to use the
Registry Cleaning Tool...risky. Pay close attention while installing and UNcheck offers of toolbars....especially Google.
After install, open CCleaner and run by clicking on the Run Cleaner button in the bottom right corner.
CCleaner - PC Optimization and Cleaning - Free Download
Open CCleaner and click on Tools. Choose Startups. In the opened page is the list of Windows Startups and at the
top you will see buttons for each browser and Tasks. At the bottom right of that page is button when clicked will allow you
to copy and paste each of those lists of startups in your next post. Please do that.
Eset has a good track record for finding Adware and Malware.
Hold down Control and click on this link to open ESET OnlineScan in a new window.
- Click the button.
- For alternate browsers only: (Microsoft Internet Explorer users can skip these steps)
- Click on esetsmartinstaller_enu.exe to download the ESET Smart Installer. Save it to your desktop.
- Double click on the icon on your desktop.
- Click the Start button.
- Accept any security warnings from your browser.
- Under scan settings, check "Scan Archives" and "Remove found threats"
- Click Advanced settings and select the following:
- Scan potentially unwanted applications
- Scan for potentially unsafe applications
- Enable Anti-Stealth technology
- ESET will then download updates for itself, install itself, and begin scanning your computer. Please be patient as this can take some time.
- When the scan completes, click List Threats
- Click Export, and save the file to your desktop using a unique name, such as ESETScan. Include the contents of this report in your next reply.
- Click the Back button.
- Click the Finish button.
- NOTE:Sometimes if ESET finds no infections it will not create a log.