Computer freezes and reboots. Help

[Cathy]

I have been having problems with my computer lately. I changed the font (and I do hope it is its name is English) and now my computer freezes when I'm playing TS3. I can't even start creating a family. The computer freezes and reboots. I think it might be my video card...I suspect it became a bit too old for the sims. It is a NVidea GeForce 9800GT (1Gb DDR 3).
This is the last TS3 log I got. It really doesn't mean anything to me because I can't understand anything, but a friend advised me to post here anyways. Thank you for any help in advance

<?xml version="1.0"?>
-<Sims3Telemetry count="22"> <Event eventStr="1711" groupId="19" moduleId="1"/> <Event eventStr="Windows 7 6.1~" groupId="1" moduleId="1"/> <Event eventStr="~.7600 " groupId="1" moduleId="1"/> <Event eventStr="GenuineIntel I~" groupId="16" moduleId="1"/> <Event eventStr="~ntel(R) Core(~" groupId="16" moduleId="1"/> <Event eventStr="~TM) i5 CPU ~" groupId="16" moduleId="1"/> <Event eventStr="~ 650 @ ~" groupId="16" moduleId="1"/> <Event eventStr="~3.20GHz RAM 3~" groupId="16" moduleId="1"/> <Event eventStr="~959 MB" groupId="16" moduleId="1"/> <Event eventStr="NVIDIA GeForce~" groupId="17" moduleId="1"/> <Event eventStr="~ 9800 GT (Mic~" groupId="17" moduleId="1"/> <Event eventStr="~rosoft Corpor~" groupId="17" moduleId="1"/> <Event eventStr="~ation - WDDM ~" groupId="17" moduleId="1"/> <Event eventStr="~v1.1) Vendor:~" groupId="17" moduleId="1"/> <Event eventStr="~ 10de, Device~" groupId="17" moduleId="1"/> <Event eventStr="~: 0614, Board~" groupId="17" moduleId="1"/> <Event eventStr="~: 913b1acc, C~" groupId="17" moduleId="1"/> <Event eventStr="~hipset: 00a2" groupId="17" moduleId="1"/> <Event eventStr="0.ML-1.0.1266" groupId="18" moduleId="1"/> <Event eventStr="pt-br" groupId="6" moduleId="4"/> <Event eventStr="BR" groupId="5" moduleId="4"/> <Event eventStr="132937055943356" groupId="20" moduleId="1"/></Sims3Telemetry>

My processor is an i5
MoBo: Msi Iona
4Gb RAM

Edit: I'm sorry if this is not the right place to post.

[Tever]

Have you tried Google yet? You should always do that first because you're likely to get an answer much faster, with less abuse and more satisfaction of knowing you solved your own problem.

[Cathy]

Yep, I did.
I've been wondering if I'll need to buy more RAM and a new video card. Mine is too old and doesn't work with directX 11

[Jeebus]

[Noromarc]

If by the sentence "I changed the font" you mean to have substituted the power supply unit of your computer for a new one, I can tell from personal experience these power supply units can apparently fail to deliver correct voltages to the motherboard. According to my local computer integrator company, I had a bad p.s.u. which freezed TS3 and also began crashing the computer in the middle of ordinary operations.

[Cathy]

Thank you so much!! I'll have the power supply (YAY!! It's always great to learn a new word in English!) checked and I'll get some more RAM, for sure.
Unfortunatelly, my vc is rusty (I live by the beach) and I'll have to buy a new one