I Need Help Please

AFTER I HAD MY COMPUTER FIXED AND WINDOWS INSTALLED BY AN ENGINEER, EVERY TIME I TRY TO OPEN MY INBOX AT HOTMAIL, IT TELLS ME “CAN’T FIND SERVER” OR “PAGE CAN’T BE DISPLAYED” ALSO AT THE RAPIDESHARE.COM SITE, AND ANY SIMILAR SITES SUCH AS UPLOADED.TO … I DON’T KNOW WHAT TO DO… PLEASE KINDLY ANSWER ME AND MANY THANKS.