With Spybot's TeaTimer whenever there is a registry change to the system it pops up a notification to allow or deny. If you selected deny change but keep getting the alert, then something is attempting to alter the registry and the pop-up notifications will continue.
From what your describing it appears your browser is set to google and is attempting to change to mysearch.myway. MySearch is an IE Toolbar and homepage/search hijacker targeted at the sites run by MyWay. However, it is pre-installed on some new Dell computers from November 2004. If your using a Dell computer, they have removal instructions here
If not, then start by doing some thorough scanning. Did you perform a scan with Spybot or any other scanning tool after these alerts started? What OS (Win XP/2000, etc) are you using? What type of anti-virus are you using and when was the last time you ran a scan?
If your running Win XP/2000, download and scan with Ewido Anti-Spyware v4.0
in "SAFE MODE
Be sure to print out the Ewido Install and Scan Instructions
You can also download and scan with Ad-Aware SE Personal 1.06
. Setup & Configure as shown here
Other scanning/cleaning tools can be found in BC's List of Virus & Malware Resources