I had the freezing issue on upgrading from Win8 to Win8.1 on my G73JW that so many has reported. It couldn't get past the 'Getting Started' part of the install. Looks like I fixed it by updating all my drivers. It may work for you too.
Here's a list of the drivers I updated in the order I installed. I first did a clean install of Win8 as it seemed stable. I then installed all the Win8.1 drivers I could find and then upgraded to v8.1.
- Bluetooth: Qualcomm Atheros W81 v8.01.312
- Chipset: Intel Inf Updater 9.3.1027
- LAN: Qualcomm Atheros Lan Driver v2.1.0.21
- WLAN: Qualcomm Atheros v10.0.0.274
- Audio: Realtek R273
- USB3: Fresco v3.5.73.0 (Note: v3.5.74.0 did not work)
- Graphics: Nvidea Geforce 331.82
- Touchpad: Synaptics v17.0.6.13 (Newer version failed to install. Found this older one. Bonus!: Supports the gestures needed by Win8)
- RST: Intel RST v 12.9.0.1001
I did have one failure but realized I installed the wrong Lan driver and had not installed RST. Once I installed these two all freezes disappeared, Win8.1 installed, and my system seems stable again. I did not worry about the model laptop I had but rather what hardware was in it in finding these drivers. Seems to work great.
I'm uploading the drivers shown above to a shared folder here:
https://drive.google.com/folderview?id=0B0C2TrPARs6HNkhYMDdSRUwzZWc&usp=sharing