chris lye

I bought a hikvision ds4008hc/hcs/hc+/hf/hs/md series dvr card and had it installed on a acer aspire with 3 gigs ram, 380 gig hard drive and an external 1t hard drive. 2.0 dual intel. Since a few days after getting it, the entire system will freeze up daily. The camera images freeze, i have no keyboard or mouse function and have to do a hard reboot. I began with vista, then tried win 7. Same problem. Attempted to reload ivms2000 and drivers. Same problem. Can anyone help?