Router Reboot Or Crash

I currently have a Netgear rangemax wnr834bv2 running ddwrt and acting as a repeater for a linksys vonage router. This setup has worked for a while to give wifi coverage to my house. I currently have 1 xp home computer on via wired connection to the linksys router, 1 xp pro computer on wired connection to the netgear router, 1 xp media center laptop on a wireless connection to whichever router is closest. Until thursday of last week, i also had 1 win7 computer connected wirelessly to the netgear router.

Last thursday, for some unknown reason, i woke up to find that everytime the windows 7 computer tried to connect, the router would reboot and give the computer limited connectivity. If I rebooted the win7 computer, then i could connect, but the connection would stay active just long enough to check email, then the router would do a soft reboot and would then give limited connectivity again. Other computers connected wirelessly or wired, would simply re-establish the connection and work fine.

I chose a restore point before thursday on the win7 computer and it works, only for about 12 hours or so, then i come home and have to restore again. I have turned off active updates and i check to see if anything has been changed, but i cannot find anything.

Has anyone heard of this happening or would know what to even check. So far, i bought another router to test with just 1 new 'win 7 compatible' router and it did the same thing. i'm just stuck.