I have tried many antiviruses but all of them cause a major problem at some point to my computer. Antivir - The updater crashes all the time and some applications (eg games) take long to load. Avast - Perfect and light but caused my shutdown to stall for an extremely long time. Kaspersky IS 2009 (build 357) - Not sure how since everyone tells me this is light but it slowed all my applications down. All my applications take almost a minute longer to load compared to avast and antivir. I hope this is a conflict because i really like the protection that kaspersky offers. Boot and shutdown is speedy though. AVG - Waiting for the fixing update before i go near it. Is there any other antiviruses i could try or any answers to these problems? Free or paid i don't mind as long as it offers strong protection and light. Popular antiviruses are my preference (eg nod, kaspersky) but not a must. My computer is pretty low-tech with 512mb ram and integrated graphics but until xp support is gone i am not getting another computer. I am currently using kaspersky is 2009 because i like its strong firewall and strong antivirus but i don't know how much longer i can handle the slowness. I will try delete files and programs to see if i can speed it up.