cd-r with virus?

hello, yes last year in October vvous I bought a cd-r windoxs 7 and I did not could get by with (dysfonctionement) I had given up and remi xp 32bit. as I reach the end of the license, I reinstalled the cd-r windows 7 64 bit. and big problem, all vertical and horizontal scrollbars their indexes is blocked on one side! mounting the index of one, and it redescent dry too! meme that the impossible hour régler.j'ai installed antivirus, can not put it on, remains on disabled.
I use a computer with motherboard asus maximus extreme that contains the microprocessor indicated for, and 8 GB of memory
question and then I turn around and get another?