Moved this to Malware Discussions > Home User Assistance.
This sunkist.notifyicondata.hWnd has been around for some time from what I gather from a Google Search.
Look in the last link in my signature below.
1. Try System Restore as suggested there.
2. Download and run Stinger and Malwarebytes Free, also linked there.
3. If all else fails then try either Hijackthis or DDS and post the logs as instructed nearer the end of that link.