I have found that a ALOT search bar has appeared despite uninstalling everything i can find related to this unwanted software. how can i get rid of it?

Windows update installed "Microsoft .NET 4 client profile" and after that Firefox started to redirect to Bing in place of Google. I removed it and everything is OK again.

Dear Mozilla Firefox developers, please to find a way to stop something similar happening in future, i.e. Firefox should not allow other programs to modify it, otherwise the security of Firefox can be overcome easily by other applications modifying Firefox and using it to access Internet. I would like Mozilla take a harsher approach toward Microsoft sneaky updates. I think it should be possible to tell Microsoft that they are not allowed to modify Firefox without prior permission from the users. Also Google should take a look at this, this can be used for an anti-trust lawsuit as Microsoft is using its operation system to force people to use Bing in place of Google.

Thanks