I am using Windows Vista. The "type" column next to my hosts file in windows explorer says "sAveRabox." This appears to be the name of adware that I recently removed. How can I restore the "type" column to the default name in windows?

I am using Windows Vista. The "type" column next to my hosts file in windows explorer says "sAveRabox." This appears to be the name of adware that I recently removed. How can I restore the "type" column to the default name in windows?

Maybe the malware was forcing that behavior via registry and the key was left there after removal.
Open the registry editor and go to HKEY_CLASSES_ROOT
See if you have a key there with the name "." (without quotes). If so, delete it, restart and see if it solves your problem.