I have an older HP computer which I have had no problems with it going slow till I got Trend Micro Internet Security Suite. After numerous emails to Trend Micro figured out when it does automatic updates to the software is when it slows it down. But since I disabled the automatic updates it doesn’t slow my system down like it was, except when it does an update. Which is so slow I just walk away from it when updating. I had the 2008 Trend Micro anti-virus without slowness issues.