Thank you for the reply,
To clear a few things up first:
- The laptop is an ASUS F5Sr, Intel® Core™2 Duo Processor 2.0 GHz, 2GB DDR2, 250 GB HDD, ATI Mobility™ Radeon® HD 3470;
- Ubuntu was installed at a later date, it was the only OS on the laptop.
- I have reinstalled the Windows 8, using the Setup tool to format the entire hard drive.
- Windows 8 is installed, updated, with the Windows 8.1 update available in the Store.
Same issue occurs. After it downloads and installs the update, when booting into Windows, it crashes, mentioning that "An unexpected error occured, blah blah, blah... Reverting back..."
I should mention that I have discussed this issue with Microsoft support and they have absolutely no idea what may be causing it.
If anyone should have an idea I would welcome it.