Youtube cat video

I restored my computer and now i am not able to use programs i did before saying that i no longer have the system requirements and i lost connection to the internet on the computer and i think its because of a virus because it worked before Im using a different computer and i was wondering what do i have to do in order to make my computer have the system stuff it did before System Microsoft Windows XP Home Edition Version 2002 Service Pack 1 Manufactured and supported by Hewlett-Packard Pavilion Intel(R) Pentium(R) 4 CPU 2.80GHz 2.80GHz 504 MB of RAM I can’t even download Windows Live messenger santoramaa