What is next step after 2 year old system wont boot windows

Hello,

I came home after a power outage and could not get my homebuilt computer to start windows anymore. When loading windows it would either get BSOD, or go boot itself back up. What is strange is that I was able to get into safe mode without networking a couple times. Was never able to get it to boot in safe mode with networking.

I would like to try and get some more use out of the computer if I can, so I am looking for some advice on how best to get it back into working order. I dont really use it for anything beyond a standard desktop nowadays, and mainly want to fix it so I have a backup

Here is what I purchased for it a couple years ago
1 x Intel Core i5-750 Lynnfield 2.66GHz LGA 1156 95W Quad-Core Processor BX80605I5750
1 x GIGABYTE GA-P55M-UD4 LGA 1156 Intel P55 Micro ATX Intel Motherboard
1 x COOLER MASTER HAF 922 RC-922M-KKN3-GP Black Steel + Plastic and Mesh Bezel ATX Mid Tower Computer Case with USB ...
1 x XFX HD-577X-ZNFC Radeon HD 5770 1GB 128-bit DDR5 PCI Express 2.0 x16 HDCP Ready CrossFireX Support Video Card
1 x COOLER MASTER Hyper 212 Plus RR-B10-212P-G1 "Heatpipe Direct Contact" Long Life Sleeve 120mm CPU Cooler Compatible ...
2 x G.SKILL 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Dual Channel Kit Desktop Memory Model F3-12800CL9D-
1 x CORSAIR CMPSU-750TX 750W ATX12V v2.2 SLI Certified CrossFire Ready 80 PLUS Certified Active PFC Compatible with ...
2 x Samsung by Seagate Spinpoint F3 HD502HJ/ST500DM005 500GB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare Drive

Thanks in advance