ok the other day i bought a second hand computer and its anti virus expired and i installed avast then it froze and i fixed it with safe mode and uninstalled both anti virus so i went on filehippo.com and downloaded bit defender and done a full system scan the following day i done another scan for viruses as i was browsing the web before hand and it finished and 2 thousand viruses were found so i then browse the internet then and i fnish up and log off my computer turn it on a couple of hours later and after the welcome screen its frozen and i tried doing safe mode i tried reebooting i tried pressing ctrl alt del that doesnt work and last known configuiration doesnt work i havnt got any money to get it fixed i only got it 2 weeks ago for 100 euro its dell flat screen moniter computer is 45000 series pleas help me!