Which browser? Some of them it is hard to change the home page.. Some of them may automatically check and restore it.
HOWEVER. That is the behavior of many mal-ware programs. Just not, normally, MSN and GOOGLE as the ones they switch to.. I've had some really strange stuff pop up.
NOW: if you have any "Security" toolbars installed, some of them prevent the changing of home pages and search engines.. These will usually lock it to either their choice of home/search pages/engines or what was in place when they were installed. I generally do not like tool bars as well.. I have a firewall and an A/V program snd at least two other programs that all come with tool bars and eventually.... I run out of realestate for the page I'm trying to view.
I recommend a good Mal-ware scan with multiple anti-viruals, AVG, AVAST and Malware Bytes would be my choices.. Malware Bytes is Staples choice as well.
If you do not have a firewall (Or are just using the "Windows firewall" get a good one.. Like Zone alarm.
ALL the above have free editions.. And that is my recommendation.
