Hi midave,

Welcome to Dell Community.

There are several reasons why this could be happening - from outdated or corrupt software to an infection.

My suggestion is to post the required DDS logs on the Malware Removal Forum at SpywareHammer and have the staff trained in malware removal walk you through the diagnostic logs and a cleanup. They do not use remote access but will advise you step-by-step on what you can do.

Please do not attempt to run any additional scans, install software, or use any other tools until an analyst can advise you on the next step. Please use the same username there as you have here. Help is free, but you will need to register there and follow the posting instructions. The instructions will inform you of where to download DDS and how to run a scan to post the output information.

Good luck. Let us know  if the issue is resolved.