Changing browser may not solve the problem. To use the above example, it's like putting the condom on afterwards.
For your homepage to be changed a program of some kind has to be run, it could be an event launched by loading IE but more likely it's a memory resident program as most browser hijacking is.
Memory resident programs can be a problem, because they often do more than just change your homepage. You may have adware or a virus, but whatever it is, it's malware.
Try the usual adware removal tools and if you use one a virus checker, but most importantly of all check your task manager and put the task names into google/altavista and check them to make sure all the tasks running are things you want to be running.
Startup programs can be in a number of places, but most likely is in one of the various registry "Run" sections. If you have multiple user logins configured you may have to search several sections of the registry to check all "Run" folders.
Also dont overlook the easy things like the start menu "startup" folder (which I did once to my dismay!).
Pre-XP Windows can also use win.ini and the autoexec.bat to launch malware, look for shell= run= in win.ini and in autoexec.bat remove any command line operators after "Win" if present.
EDIT: shell= should say explorer.exe (although changing it to progman.exe can be quite a fun thing to do to OTHER peoples PC's ;) ).
For your homepage to be changed a program of some kind has to be run, it could be an event launched by loading IE but more likely it's a memory resident program as most browser hijacking is.
Memory resident programs can be a problem, because they often do more than just change your homepage. You may have adware or a virus, but whatever it is, it's malware.
Try the usual adware removal tools and if you use one a virus checker, but most importantly of all check your task manager and put the task names into google/altavista and check them to make sure all the tasks running are things you want to be running.
Startup programs can be in a number of places, but most likely is in one of the various registry "Run" sections. If you have multiple user logins configured you may have to search several sections of the registry to check all "Run" folders.
Also dont overlook the easy things like the start menu "startup" folder (which I did once to my dismay!).
Pre-XP Windows can also use win.ini and the autoexec.bat to launch malware, look for shell= run= in win.ini and in autoexec.bat remove any command line operators after "Win" if present.
EDIT: shell= should say explorer.exe (although changing it to progman.exe can be quite a fun thing to do to OTHER peoples PC's ;) ).