Howdy:
As cdogg requested, it is really important to know what you have running on your system when it boots up (programs, etc)..
System Resources have very little to do with the amount of RAM installed on your system.. System Resources is limited to the first 64kb of memory REGARDLESS if you have 64megs of ram or a gig of ram installed.. The more programs/options opening and running reduce those resources to the point where your system can slow right down, give error messages relating to a lack of resources or simply, lock up..
Murray