Computer crashed, is now messed up

I have my computer set to just go to sleep instead of turning it off, but sometimes when my computer wakes up, it re-boots itself, as if it were powered off, but it resumes my windows session. This time something happened and I got a screen and it asked me to choose default configuration or last good configuration. I wasnt sure what happened, so I selected last good configuration and now the date on my computer says 12/31/09. There are also icons missing, such as my internet connection strength, etc. I tried system restore from yesterday, it didnt fix it. What happened, and how can I correct this?

Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 7 Home Premium, Service Pack 1, 64 bit
Processor: AMD Phenom(tm) II X6 1055T Processor, AMD64 Family 16 Model 10 Stepping 0
Processor Count: 6
RAM: 8189 Mb
Graphics Card: ATI Radeon HD 5400 Series, 512 Mb
Hard Drives: C: Total - 953766 MB, Free - 725854 MB; E: Total - 238414 MB, Free - 8929 MB;
Motherboard: Gigabyte Technology Co., Ltd., GA-880GM-USB3
Antivirus: avast! Antivirus, Updated and Enabled