|Did you use windows 'create a recovery drive' application when you created the flash drive or did you just copy the partition to the drive?|
If you used the application the flash drive should work either from the advanced startup options (if it gets that far) or you can directly boot from it. Some info here:
If you just copied the partition to the flash drive, well I don't know, you'd just have to try and see if it'll run. If not you'll need to reinstall windows 8 from scratch. Some info on downloading it here:
The download won't contain software that came preinstalled on your PC and some drivers may be missing (which you should be able to download from the support page for your system or motherboard model).
It's also possible the 'crash' was the result of a hard drive gone bad. In that case you'll need to replace it before you can successfully install windows.
Edit The PCSupport page didn't seem to be all that helpful. Check here too:
message edited by DAVEINCAPS