russellhyldon

Hi everyone, Im having a total nightmare with my laptop, Ive had it for about a year and for some reason whenever I tried to download files/applications it would come up "curupt file", after a very long time trying to look for answers, i decided to save all my files and I used system restore and wiped everything off my laptop and restored the laptop to "factory settings". After doing this I tried to download firefox and then "invalid digital signature" poped up underneath the download, so i ran the file anyway and "curupt file" appeared. I tried downloading google chrome and the same thing happend, its happens to everything now that i try and download. I could really do with some help on this as no one seems what I can do, also I was toled to try and download mulwarebytes, but everytime i try and download it the same things happens. i hope someone can help me.